diff --git a/Makefile b/Makefile
index 94eb0726a0..f154b06902 100644
--- a/Makefile
+++ b/Makefile
@@ -679,7 +679,7 @@ C_SOURCES += town_gui.c
 C_SOURCES += train_cmd.c
 C_SOURCES += train_gui.c
 C_SOURCES += tree_cmd.c
-C_SOURCES += ttd.c
+C_SOURCES += openttd.c
 C_SOURCES += tunnelbridge_cmd.c
 C_SOURCES += unmovable_cmd.c
 C_SOURCES += vehicle.c
@@ -830,7 +830,7 @@ lang/%.lng: lang/%.txt $(STRGEN) lang/english.txt
 	@echo '===> Compiling language $(*F)'
 	$(Q)$(STRGEN) $(STRGEN_FLAGS) $< $(LANG_ERRORS)
 
-winres.o: ttd.rc
+winres.o: openttd.rc
 	@echo '===> Compiling resource $<'
 	$(Q)$(WINDRES) -o $@ $<
 
diff --git a/ai.c b/ai.c
index 33d0aa4161..6885bac334 100644
--- a/ai.c
+++ b/ai.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "map.h"
 #include "tile.h"
 #include "player.h"
diff --git a/ai_build.c b/ai_build.c
index 1328bd535a..32d31331f1 100644
--- a/ai_build.c
+++ b/ai_build.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "map.h"
 #include "tile.h"
diff --git a/ai_new.c b/ai_new.c
index a2317fc068..93b7c20ef8 100644
--- a/ai_new.c
+++ b/ai_new.c
@@ -16,7 +16,7 @@
  */
 
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/ai_pathfinder.c b/ai_pathfinder.c
index 4fc273f581..734a82c4b8 100644
--- a/ai_pathfinder.c
+++ b/ai_pathfinder.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "map.h"
 #include "tile.h"
diff --git a/ai_shared.c b/ai_shared.c
index 9a82f744a6..bd85b38104 100644
--- a/ai_shared.c
+++ b/ai_shared.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "map.h"
 #include "ai.h"
diff --git a/aircraft_cmd.c b/aircraft_cmd.c
index 3336792954..68a404b274 100644
--- a/aircraft_cmd.c
+++ b/aircraft_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/aircraft_gui.c b/aircraft_gui.c
index 8f9c89e222..f15485762f 100644
--- a/aircraft_gui.c
+++ b/aircraft_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/airport.c b/airport.c
index 1acf083514..36be248f4d 100644
--- a/airport.c
+++ b/airport.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "map.h"
 #include "airport.h"
diff --git a/airport_gui.c b/airport_gui.c
index cbb904fba8..b2c696a4b8 100644
--- a/airport_gui.c
+++ b/airport_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/aystar.c b/aystar.c
index 82ccb5800b..e2f9109fed 100644
--- a/aystar.c
+++ b/aystar.c
@@ -15,7 +15,7 @@
  */
 
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "aystar.h"
 // This looks in the Hash if a node exists in ClosedList
 //  If so, it returns the PathNode, else NULL
diff --git a/bridge_gui.c b/bridge_gui.c
index 5d9fa45acd..b8f940df8a 100644
--- a/bridge_gui.c
+++ b/bridge_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "window.h"
diff --git a/callback_table.c b/callback_table.c
index 4dde04b50b..0299bb74e1 100644
--- a/callback_table.c
+++ b/callback_table.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "functions.h"
 
 // If you add a callback for DoCommandP, also add the callback in here
diff --git a/clear_cmd.c b/clear_cmd.c
index 0ee8ee70a7..124723fec6 100644
--- a/clear_cmd.c
+++ b/clear_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/command.c b/command.c
index 7c198ec363..e0c9488413 100644
--- a/command.c
+++ b/command.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "gui.h"
diff --git a/console.c b/console.c
index 763996328c..6239e4b602 100644
--- a/console.c
+++ b/console.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/console_cmds.c b/console_cmds.c
index a79f34b176..26bcea04ed 100644
--- a/console_cmds.c
+++ b/console_cmds.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "console.h"
 #include "debug.h"
 #include "engine.h"
diff --git a/debug.c b/debug.c
index 2ac39fde46..3230c96d7d 100644
--- a/debug.c
+++ b/debug.c
@@ -1,7 +1,7 @@
 #include "stdafx.h"
 #include <stdio.h>
 #include <stdarg.h>
-#include "ttd.h"
+#include "openttd.h"
 #include "console.h"
 #include "debug.h"
 #include "string.h"
diff --git a/dedicated.c b/dedicated.c
index 11c83fc0cb..a4a9198ab8 100644
--- a/dedicated.c
+++ b/dedicated.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "network.h"
 #include "hal.h"
diff --git a/depot.c b/depot.c
index 289ef7a274..432405c2af 100644
--- a/depot.c
+++ b/depot.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "depot.h"
 #include "tile.h"
 #include "map.h"
diff --git a/disaster_cmd.c b/disaster_cmd.c
index c6ec0ea499..a66c4c0a4a 100644
--- a/disaster_cmd.c
+++ b/disaster_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/dock_gui.c b/dock_gui.c
index 33de7e5160..c705b1a827 100644
--- a/dock_gui.c
+++ b/dock_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/dummy_land.c b/dummy_land.c
index 8efd8803dd..107647d9a6 100644
--- a/dummy_land.c
+++ b/dummy_land.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "viewport.h"
 #include "command.h"
diff --git a/economy.c b/economy.c
index 03df70124d..889d7c6bcf 100644
--- a/economy.c
+++ b/economy.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "strings.h" // XXX InjectDParam()
 #include "table/strings.h"
 #include "map.h"
diff --git a/engine.c b/engine.c
index 543e1129fd..e1a1399838 100644
--- a/engine.c
+++ b/engine.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "engine.h"
diff --git a/engine_gui.c b/engine_gui.c
index 9f4abb4749..2961c8b986 100644
--- a/engine_gui.c
+++ b/engine_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/fileio.c b/fileio.c
index 4b6fee1ce0..4a9cd0284a 100644
--- a/fileio.c
+++ b/fileio.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "fileio.h"
 #if defined(UNIX) || defined(__OS2__)
 #include <ctype.h> // required for tolower()
diff --git a/gfx.c b/gfx.c
index 6c81b42162..346f4c71de 100644
--- a/gfx.c
+++ b/gfx.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "spritecache.h"
 #include "strings.h"
 #include "gfx.h"
diff --git a/graph_gui.c b/graph_gui.c
index d27c140b95..8c48331362 100644
--- a/graph_gui.c
+++ b/graph_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/industry_cmd.c b/industry_cmd.c
index 441d6447e4..c21c80d914 100644
--- a/industry_cmd.c
+++ b/industry_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/industry_gui.c b/industry_gui.c
index 57ac668952..4776ea97fb 100644
--- a/industry_gui.c
+++ b/industry_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "strings.h"
 #include "table/strings.h"
diff --git a/intro_gui.c b/intro_gui.c
index 1725d400d3..273d9588e5 100644
--- a/intro_gui.c
+++ b/intro_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/landscape.c b/landscape.c
index 755e3a48fa..881ca67a14 100644
--- a/landscape.c
+++ b/landscape.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "map.h"
 #include "spritecache.h"
 #include "table/sprites.h"
diff --git a/main_gui.c b/main_gui.c
index de5c8cfe4c..08c790e399 100644
--- a/main_gui.c
+++ b/main_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "spritecache.h"
 #include "strings.h"
 #include "table/sprites.h"
diff --git a/map.c b/map.c
index ae8d2e916c..a397d4b8fc 100644
--- a/map.c
+++ b/map.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "functions.h"
 #include "map.h"
diff --git a/misc.c b/misc.c
index 1d8a709b03..4c88c88053 100644
--- a/misc.c
+++ b/misc.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "strings.h" // XXX GetParam*
 #include "table/strings.h"
diff --git a/misc_cmd.c b/misc_cmd.c
index a8b357ec71..430bef6bd4 100644
--- a/misc_cmd.c
+++ b/misc_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "table/strings.h"
 #include "command.h"
diff --git a/misc_gui.c b/misc_gui.c
index 63fb1b6ef2..b737ee3c47 100644
--- a/misc_gui.c
+++ b/misc_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "spritecache.h"
 #include "strings.h"
diff --git a/mixer.c b/mixer.c
index 706eaae5db..2393eb9c09 100644
--- a/mixer.c
+++ b/mixer.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "mixer.h"
 
 struct MixerChannel {
diff --git a/music_gui.c b/music_gui.c
index 459689736d..c16efaa992 100644
--- a/music_gui.c
+++ b/music_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/namegen.c b/namegen.c
index 887af46402..59d217b2a9 100644
--- a/namegen.c
+++ b/namegen.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "namegen.h"
 #include "table/namegen.h"
diff --git a/network_data.h b/network_data.h
index 48e1cf19e0..38a817d1a7 100644
--- a/network_data.h
+++ b/network_data.h
@@ -1,7 +1,7 @@
 #ifndef NETWORK_DATA_H
 #define NETWORK_DATA_H
 
-#include "ttd.h"
+#include "openttd.h"
 #include "network.h"
 #include "network_core.h"
 
diff --git a/network_gui.c b/network_gui.c
index 4f80257137..44ff45f910 100644
--- a/network_gui.c
+++ b/network_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "strings.h"
 #include "table/sprites.h"
diff --git a/newgrf.c b/newgrf.c
index 0815d80344..df9fbed7c1 100644
--- a/newgrf.c
+++ b/newgrf.c
@@ -2,7 +2,7 @@
 
 #include <stdarg.h>
 
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "gfx.h"
 #include "fileio.h"
diff --git a/news_gui.c b/news_gui.c
index 30e3831353..700f589e4d 100644
--- a/news_gui.c
+++ b/news_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "strings.h"
 #include "table/sprites.h"
 #include "table/strings.h"
diff --git a/npf.c b/npf.c
index fd331ae96f..0c24c05926 100644
--- a/npf.c
+++ b/npf.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "npf.h"
 #include "aystar.h"
diff --git a/npf.h b/npf.h
index dcbe645296..e239c8971c 100644
--- a/npf.h
+++ b/npf.h
@@ -3,7 +3,7 @@
 
 /* Blaat */
 
-#include "ttd.h"
+#include "openttd.h"
 #include "aystar.h"
 #include "vehicle.h"
 
diff --git a/oldloader.c b/oldloader.c
index 89a8da27c1..141e31e713 100644
--- a/oldloader.c
+++ b/oldloader.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "town.h"
diff --git a/ttd.c b/openttd.c
similarity index 99%
rename from ttd.c
rename to openttd.c
index ba8f241f06..619c964f82 100644
--- a/ttd.c
+++ b/openttd.c
@@ -7,7 +7,7 @@
 #include "tile.h"
 
 #define VARDEF
-#include "ttd.h"
+#include "openttd.h"
 #include "mixer.h"
 #include "spritecache.h"
 #include "gfx.h"
diff --git a/ttd.dsp b/openttd.dsp
similarity index 94%
rename from ttd.dsp
rename to openttd.dsp
index 12287d265a..8231e72577 100644
--- a/ttd.dsp
+++ b/openttd.dsp
@@ -1,24 +1,24 @@
-# Microsoft Developer Studio Project File - Name="ttd" - Package Owner=<4>
+# Microsoft Developer Studio Project File - Name="openttd" - Package Owner=<4>
 # Microsoft Developer Studio Generated Build File, Format Version 6.00
 # ** DO NOT EDIT **
 
 # TARGTYPE "Win32 (x86) Console Application" 0x0103
 
-CFG=ttd - Win32 Debug
+CFG=openttd - Win32 Debug
 !MESSAGE This is not a valid makefile. To build this project using NMAKE,
 !MESSAGE use the Export Makefile command and run
 !MESSAGE
-!MESSAGE NMAKE /f "ttd.mak".
+!MESSAGE NMAKE /f "openttd.mak".
 !MESSAGE
 !MESSAGE You can specify a configuration when running NMAKE
 !MESSAGE by defining the macro CFG on the command line. For example:
 !MESSAGE
-!MESSAGE NMAKE /f "ttd.mak" CFG="ttd - Win32 Checked"
+!MESSAGE NMAKE /f "openttd.mak" CFG="openttd - Win32 Checked"
 !MESSAGE
 !MESSAGE Possible choices for configuration are:
 !MESSAGE
-!MESSAGE "ttd - Win32 Release" (based on "Win32 (x86) Console Application")
-!MESSAGE "ttd - Win32 Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE "openttd - Win32 Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "openttd - Win32 Debug" (based on "Win32 (x86) Console Application")
 !MESSAGE
 
 # Begin Project
@@ -28,7 +28,7 @@ CFG=ttd - Win32 Debug
 CPP=cl.exe
 RSC=rc.exe
 
-!IF  "$(CFG)" == "ttd - Win32 Release"
+!IF  "$(CFG)" == "openttd - Win32 Release"
 
 # PROP BASE Use_MFC 0
 # PROP BASE Use_Debug_Libraries 0
@@ -54,7 +54,7 @@ LINK32=link.exe
 # ADD LINK32 kernel32.lib user32.lib gdi32.lib winmm.lib ws2_32.lib libpng.lib zlibstat.lib /nologo /subsystem:windows /map /machine:I386 /opt:nowin98
 # SUBTRACT LINK32 /pdb:none
 
-!ELSEIF  "$(CFG)" == "ttd - Win32 Debug"
+!ELSEIF  "$(CFG)" == "openttd - Win32 Debug"
 
 # PROP BASE Use_MFC 0
 # PROP BASE Use_Debug_Libraries 1
@@ -84,8 +84,8 @@ LINK32=link.exe
 
 # Begin Target
 
-# Name "ttd - Win32 Release"
-# Name "ttd - Win32 Debug"
+# Name "openttd - Win32 Release"
+# Name "openttd - Win32 Debug"
 
 # Begin Group "Source Files"
 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
@@ -173,11 +173,11 @@ SOURCE=.\md5.c
 # Begin Source File
 SOURCE=.\minilzo.c
 
-!IF  "$(CFG)" == "ttd - Win32 Release"
+!IF  "$(CFG)" == "openttd - Win32 Release"
 
 # SUBTRACT CPP /YX /Yc /Yu
 
-!ELSEIF  "$(CFG)" == "ttd - Win32 Debug"
+!ELSEIF  "$(CFG)" == "openttd - Win32 Debug"
 
 # SUBTRACT CPP /YX
 
@@ -265,11 +265,11 @@ SOURCE=.\spritecache.c
 
 SOURCE=.\StdAfx.c
 
-!IF  "$(CFG)" == "ttd - Win32 Release"
+!IF  "$(CFG)" == "openttd - Win32 Release"
 
 # ADD CPP /Yc"stdafx.h"
 
-!ELSEIF  "$(CFG)" == "ttd - Win32 Debug"
+!ELSEIF  "$(CFG)" == "openttd - Win32 Debug"
 
 !ENDIF
 
@@ -292,22 +292,22 @@ SOURCE=.\tile.c
 # End Source File
 
 # Begin Source File
-SOURCE=.\ttd.c
+SOURCE=.\openttd.c
 # End Source File
 
 # Begin Source File
-SOURCE=.\ttd.rc
+SOURCE=.\openttd.rc
 # End Source File
 
 # Begin Source File
 
 SOURCE=.\unix.c
 
-!IF  "$(CFG)" == "ttd - Win32 Release"
+!IF  "$(CFG)" == "openttd - Win32 Release"
 
 # PROP Exclude_From_Build 1
 
-!ELSEIF  "$(CFG)" == "ttd - Win32 Debug"
+!ELSEIF  "$(CFG)" == "openttd - Win32 Debug"
 
 # PROP Exclude_From_Build 1
 
@@ -339,11 +339,11 @@ SOURCE=.\waypoint.c
 
 SOURCE=.\w32dm2.cpp
 
-!IF  "$(CFG)" == "ttd - Win32 Release"
+!IF  "$(CFG)" == "openttd - Win32 Release"
 
 # SUBTRACT CPP /YX /Yc /Yu
 
-!ELSEIF  "$(CFG)" == "ttd - Win32 Debug"
+!ELSEIF  "$(CFG)" == "openttd - Win32 Debug"
 
 !ENDIF
 
@@ -499,7 +499,7 @@ SOURCE=.\town.h
 # End Source File
 
 # Begin Source File
-SOURCE=.\ttd.h
+SOURCE=.\openttd.h
 # End Source File
 
 # Begin Source File
diff --git a/ttd.dsw b/openttd.dsw
similarity index 94%
rename from ttd.dsw
rename to openttd.dsw
index 86e4d34bea..6ef816d4c2 100644
--- a/ttd.dsw
+++ b/openttd.dsw
@@ -30,7 +30,7 @@ Package=<4>
 
 ###############################################################################
 
-Project: "ttd"=.\ttd.dsp - Package Owner=<4>
+Project: "openttd"=.\openttd.dsp - Package Owner=<4>
 
 Package=<5>
 {{{
diff --git a/ttd.h b/openttd.h
similarity index 100%
rename from ttd.h
rename to openttd.h
diff --git a/ttd.rc b/openttd.rc
similarity index 100%
rename from ttd.rc
rename to openttd.rc
diff --git a/ttd.sln b/openttd.sln
similarity index 94%
rename from ttd.sln
rename to openttd.sln
index 15bcf5e154..c8072d9e9b 100644
--- a/ttd.sln
+++ b/openttd.sln
@@ -3,7 +3,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "strgen", "strgen\strgen.vcp
 	ProjectSection(ProjectDependencies) = postProject
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ttd", "ttd.vcproj", "{668328A0-B40E-4CDB-BD72-D0064424414A}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "openttd", "openttd.vcproj", "{668328A0-B40E-4CDB-BD72-D0064424414A}"
 	ProjectSection(ProjectDependencies) = postProject
 		{0F066B23-18DF-4284-8265-F4A5E7E3B966} = {0F066B23-18DF-4284-8265-F4A5E7E3B966}
 		{A133A442-BD0A-4ADE-B117-AD7545E4BDD1} = {A133A442-BD0A-4ADE-B117-AD7545E4BDD1}
diff --git a/ttd.vcproj b/openttd.vcproj
similarity index 97%
rename from ttd.vcproj
rename to openttd.vcproj
index de43463d3e..4bfe6ac4e6 100644
--- a/ttd.vcproj
+++ b/openttd.vcproj
@@ -2,7 +2,7 @@
 <VisualStudioProject
 	ProjectType="Visual C++"
 	Version="7.10"
-	Name="ttd"
+	Name="openttd"
 	SccProjectName=""
 	SccLocalPath="">
 	<Platforms>
@@ -38,7 +38,7 @@
 				DefaultCharIsUnsigned="TRUE"
 				UsePrecompiledHeader="1"
 				PrecompiledHeaderThrough="stdafx.h"
-				PrecompiledHeaderFile=".\Release/ttd.pch"
+				PrecompiledHeaderFile=".\Release/openttd.pch"
 				AssemblerOutput="2"
 				AssemblerListingLocation=".\Release/"
 				ObjectFile=".\Release/"
@@ -57,16 +57,16 @@
 				OutputFile=".\Release/openttd.exe"
 				LinkIncremental="1"
 				SuppressStartupBanner="TRUE"
-				ProgramDatabaseFile=".\Release/ttd.pdb"
+				ProgramDatabaseFile=".\Release/openttd.pdb"
 				GenerateMapFile="TRUE"
-				MapFileName=".\Release/ttd.map"
+				MapFileName=".\Release/openttd.map"
 				SubSystem="2"
 				OptimizeReferences="2"
 				OptimizeForWindows98="1"
 				TargetMachine="1"/>
 			<Tool
 				Name="VCMIDLTool"
-				TypeLibraryName=".\Release/ttd.tlb"
+				TypeLibraryName=".\Release/openttd.tlb"
 				HeaderFileName=""/>
 			<Tool
 				Name="VCPostBuildEventTool"/>
@@ -105,7 +105,7 @@
 				RuntimeLibrary="5"
 				UsePrecompiledHeader="2"
 				PrecompiledHeaderThrough="stdafx.h"
-				PrecompiledHeaderFile=".\Debug/ttd.pch"
+				PrecompiledHeaderFile=".\Debug/openttd.pch"
 				AssemblerListingLocation=".\Debug/"
 				ObjectFile=".\Debug/"
 				ProgramDataBaseFileName=".\Debug/"
@@ -125,12 +125,12 @@
 				LinkIncremental="0"
 				SuppressStartupBanner="TRUE"
 				GenerateDebugInformation="TRUE"
-				ProgramDatabaseFile=".\Debug/ttd.pdb"
+				ProgramDatabaseFile=".\Debug/openttd.pdb"
 				SubSystem="2"
 				TargetMachine="1"/>
 			<Tool
 				Name="VCMIDLTool"
-				TypeLibraryName=".\Debug/ttd.tlb"
+				TypeLibraryName=".\Debug/openttd.tlb"
 				HeaderFileName=""/>
 			<Tool
 				Name="VCPostBuildEventTool"/>
@@ -308,10 +308,10 @@
 				RelativePath=".\tile.c">
 			</File>
 			<File
-				RelativePath="ttd.c">
+				RelativePath="openttd.c">
 			</File>
 			<File
-				RelativePath="ttd.rc">
+				RelativePath="openttd.rc">
 			</File>
 			<File
 				RelativePath="vehicle.c">
@@ -475,7 +475,7 @@
 				RelativePath=".\town.h">
 			</File>
 			<File
-				RelativePath="ttd.h">
+				RelativePath="openttd.h">
 			</File>
 			<File
 				RelativePath="variables.h">
diff --git a/order_cmd.c b/order_cmd.c
index f068d15abf..2476444591 100644
--- a/order_cmd.c
+++ b/order_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "airport.h"
 #include "depot.h"
 #include "table/strings.h"
diff --git a/order_gui.c b/order_gui.c
index 966a84839b..1361537947 100644
--- a/order_gui.c
+++ b/order_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/pathfind.c b/pathfind.c
index 58eaba04aa..c8b75ed154 100644
--- a/pathfind.c
+++ b/pathfind.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "map.h"
 #include "tile.h"
 #include "pathfind.h"
diff --git a/player_gui.c b/player_gui.c
index 8b5e2f2e47..ceb21a605f 100644
--- a/player_gui.c
+++ b/player_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "window.h"
diff --git a/players.c b/players.c
index 17a4b54eec..58cc52bcb7 100644
--- a/players.c
+++ b/players.c
@@ -2,7 +2,7 @@
  * sjdlfkasjdf
  */
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "strings.h"
 #include "table/strings.h"
diff --git a/pool.c b/pool.c
index 5f41716688..cb12311b78 100644
--- a/pool.c
+++ b/pool.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "pool.h"
 
diff --git a/queue.c b/queue.c
index 034af816b3..56260cf27d 100644
--- a/queue.c
+++ b/queue.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "queue.h"
 
 static void Stack_Clear(Queue* q, bool free_values)
diff --git a/rail_cmd.c b/rail_cmd.c
index 42516594b0..d155e40ae1 100644
--- a/rail_cmd.c
+++ b/rail_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "gfx.h"
diff --git a/rail_gui.c b/rail_gui.c
index 9734c138f3..0d88dc50e0 100644
--- a/rail_gui.c
+++ b/rail_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/road_cmd.c b/road_cmd.c
index 8122fc9c84..ce8659cb20 100644
--- a/road_cmd.c
+++ b/road_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/road_gui.c b/road_gui.c
index b7efcebd39..d2ab49ba2d 100644
--- a/road_gui.c
+++ b/road_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/roadveh_cmd.c b/roadveh_cmd.c
index 60c59f1529..7d469579b6 100644
--- a/roadveh_cmd.c
+++ b/roadveh_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/roadveh_gui.c b/roadveh_gui.c
index 96faab074a..0924941541 100644
--- a/roadveh_gui.c
+++ b/roadveh_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/saveload.c b/saveload.c
index 55166f40bd..8172f39efc 100644
--- a/saveload.c
+++ b/saveload.c
@@ -14,7 +14,7 @@
  * @see SaveLoad
  */
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "vehicle.h"
 #include "station.h"
diff --git a/screenshot.c b/screenshot.c
index b7129a4a9c..098070f38d 100644
--- a/screenshot.c
+++ b/screenshot.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "strings.h"
 #include "table/strings.h"
diff --git a/sdl.c b/sdl.c
index bb73f44829..e0f955f7a4 100644
--- a/sdl.c
+++ b/sdl.c
@@ -1,7 +1,7 @@
 #include "stdafx.h"
 
 #if defined(WITH_SDL)
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "gfx.h"
 #include "mixer.h"
diff --git a/settings.c b/settings.c
index 68411f2abd..0358d0fca0 100644
--- a/settings.c
+++ b/settings.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "sound.h"
 #include "string.h"
 #include "table/currency.h"
diff --git a/settings_gui.c b/settings_gui.c
index cfdf18c3bc..a0d716e6a8 100644
--- a/settings_gui.c
+++ b/settings_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "strings.h" // XXX GetCurrentCurrencyRate()
 #include "table/sprites.h"
diff --git a/ship_cmd.c b/ship_cmd.c
index b8190d6b7f..1db631b1ef 100644
--- a/ship_cmd.c
+++ b/ship_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/ship_gui.c b/ship_gui.c
index 70e39c49ef..640361fc21 100644
--- a/ship_gui.c
+++ b/ship_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/signs.c b/signs.c
index d39382ec2c..707d557887 100644
--- a/signs.c
+++ b/signs.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "signs.h"
 #include "saveload.h"
diff --git a/smallmap_gui.c b/smallmap_gui.c
index 51c2f7f75d..46926c2cee 100644
--- a/smallmap_gui.c
+++ b/smallmap_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "spritecache.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/sound.c b/sound.c
index 4d87d8fe60..071fdd17e8 100644
--- a/sound.c
+++ b/sound.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "map.h"
 #include "mixer.h"
 #include "sound.h"
diff --git a/sprite.c b/sprite.c
index 8341b01c0d..617d0705e6 100644
--- a/sprite.c
+++ b/sprite.c
@@ -2,7 +2,7 @@
 
 #include <stdarg.h>
 
-#include "ttd.h"
+#include "openttd.h"
 #include "sprite.h"
 
 
diff --git a/spritecache.c b/spritecache.c
index b9310e02e1..2937ba2b86 100644
--- a/spritecache.c
+++ b/spritecache.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "gfx.h"
 #include "spritecache.h"
diff --git a/station_cmd.c b/station_cmd.c
index bd276ed94c..c01cb64e9c 100644
--- a/station_cmd.c
+++ b/station_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/sprites.h"
 #include "table/strings.h"
diff --git a/station_gui.c b/station_gui.c
index 046b580ecd..294e14f342 100644
--- a/station_gui.c
+++ b/station_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "strings.h"
 #include "table/strings.h"
diff --git a/strings.c b/strings.c
index c906b89529..11632a97fa 100644
--- a/strings.c
+++ b/strings.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "strings.h"
 #include "table/strings.h"
diff --git a/subsidy_gui.c b/subsidy_gui.c
index 03b8069901..d7237a1889 100644
--- a/subsidy_gui.c
+++ b/subsidy_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "window.h"
 #include "gui.h"
diff --git a/table/namegen.h b/table/namegen.h
index e5977b9ef2..923ec2dfae 100644
--- a/table/namegen.h
+++ b/table/namegen.h
@@ -1,5 +1,5 @@
 #include "../stdafx.h"
-#include "../ttd.h"
+#include "../openttd.h"
 
 static const char *name_original_english_1[] = {
 	"Great ",
diff --git a/terraform_gui.c b/terraform_gui.c
index 10845c4d26..738c3eb554 100644
--- a/terraform_gui.c
+++ b/terraform_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "tile.h"
diff --git a/texteff.c b/texteff.c
index b418b55de1..db3ee04c12 100644
--- a/texteff.c
+++ b/texteff.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "strings.h"
 #include "gfx.h"
 #include "viewport.h"
diff --git a/town_cmd.c b/town_cmd.c
index b9d9609261..711774752c 100644
--- a/town_cmd.c
+++ b/town_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "strings.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/town_gui.c b/town_gui.c
index 17c98fd201..0767e078f7 100644
--- a/town_gui.c
+++ b/town_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "strings.h"
 #include "table/sprites.h"
diff --git a/train_cmd.c b/train_cmd.c
index 483eb73708..185464b6f2 100644
--- a/train_cmd.c
+++ b/train_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/train_gui.c b/train_gui.c
index 1e8ce749c5..8cec32d19f 100644
--- a/train_gui.c
+++ b/train_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/tree_cmd.c b/tree_cmd.c
index 921878ece9..18b71c1d0d 100644
--- a/tree_cmd.c
+++ b/tree_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "table/tree_land.h"
 #include "map.h"
diff --git a/tunnelbridge_cmd.c b/tunnelbridge_cmd.c
index b489f43a74..e18c5ad183 100644
--- a/tunnelbridge_cmd.c
+++ b/tunnelbridge_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/unmovable_cmd.c b/unmovable_cmd.c
index 5a0c5345bb..00be0473f0 100644
--- a/unmovable_cmd.c
+++ b/unmovable_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"
diff --git a/vehicle.c b/vehicle.c
index fba10a87ba..d73739ad98 100644
--- a/vehicle.c
+++ b/vehicle.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "spritecache.h"
 #include "table/sprites.h"
 #include "table/strings.h"
diff --git a/vehicle_gui.c b/vehicle_gui.c
index ce67dc171c..16edc3b99c 100644
--- a/vehicle_gui.c
+++ b/vehicle_gui.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "strings.h"
 #include "table/sprites.h"
diff --git a/viewport.c b/viewport.c
index ffcd3d8b68..f1e7b5cca8 100644
--- a/viewport.c
+++ b/viewport.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "spritecache.h"
 #include "strings.h"
diff --git a/w32dm.c b/w32dm.c
index 9bd1ce3f5b..2c60768a27 100644
--- a/w32dm.c
+++ b/w32dm.c
@@ -28,7 +28,7 @@
 
 #ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
 
-#include "ttd.h"
+#include "openttd.h"
 #include "string.h"
 #include "sound.h"
 #include "hal.h"
diff --git a/w32dm2.cpp b/w32dm2.cpp
index 01a0704168..09ecf385d1 100644
--- a/w32dm2.cpp
+++ b/w32dm2.cpp
@@ -37,7 +37,7 @@
 	extern "C" {
 #endif
 
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "sound.h"
 #include "hal.h"
diff --git a/water_cmd.c b/water_cmd.c
index 9c14736e2f..b7555ec9c9 100644
--- a/water_cmd.c
+++ b/water_cmd.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "map.h"
diff --git a/waypoint.c b/waypoint.c
index 93e56b935f..f66e9e9939 100644
--- a/waypoint.c
+++ b/waypoint.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 
 #include "command.h"
 #include "gfx.h"
diff --git a/widget.c b/widget.c
index 001c706686..6cf5b03f65 100644
--- a/widget.c
+++ b/widget.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "table/sprites.h"
 #include "table/strings.h"
 #include "window.h"
diff --git a/win32.c b/win32.c
index 3c02511f8f..2b9e7c0053 100644
--- a/win32.c
+++ b/win32.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "string.h"
 #include "table/strings.h"
diff --git a/window.c b/window.c
index eaaeafab1d..22dcb116f8 100644
--- a/window.c
+++ b/window.c
@@ -1,5 +1,5 @@
 #include "stdafx.h"
-#include "ttd.h"
+#include "openttd.h"
 #include "debug.h"
 #include "map.h"
 #include "window.h"