diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index e11797d52..95eaebc22 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -1025,6 +1025,14 @@ set (PCH_SOURCES
 
 	core/menu/loadsavemenu.cpp
 	core/menu/razemenu.cpp
+	
+	#Duke is split because Duke and RR need different constants.
+	games/duke/all.cpp
+	games/duke/all_d.cpp
+	games/duke/all_r.cpp
+	exhumed/all.cpp
+	blood/all.cpp
+	sw/all.cpp
 )
 
 if( ${HAVE_VM_JIT} )
@@ -1094,7 +1102,7 @@ if( UNIX )
 	endif()
 endif()
 
-target_link_libraries( ${PROJECT_NAME} ${PROJECT_LIBRARIES} ${ZMUSIC_LIBRARIES} gdtoa lzma duke blood sw exhumed )
+target_link_libraries( ${PROJECT_NAME} ${PROJECT_LIBRARIES} ${ZMUSIC_LIBRARIES} gdtoa lzma )
 
 include_directories(
 	${CMAKE_CURRENT_SOURCE_DIR}
@@ -1353,8 +1361,3 @@ require_strnicmp()
 unset( PCH_SOURCES )
 unset( HEADER_FILES )
 unset( NOT_COMPILED_SOURCE_FILES )
-
-add_subdirectory( games/duke )
-add_subdirectory( blood )
-add_subdirectory( sw )
-add_subdirectory( exhumed )
diff --git a/source/blood/CMakeLists.txt b/source/blood/CMakeLists.txt
deleted file mode 100644
index bc17cb20f..000000000
--- a/source/blood/CMakeLists.txt
+++ /dev/null
@@ -1,72 +0,0 @@
-
-set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNOONE_EXTENSIONS" )
-
-set( PCH_SOURCES
-	src/actor.cpp
-	src/ai.cpp
-	src/aibat.cpp
-	src/aibeast.cpp
-	src/aiboneel.cpp
-	src/aiburn.cpp
-	src/aicaleb.cpp
-	src/aicerber.cpp
-	src/aicult.cpp
-	src/aigarg.cpp
-	src/aighost.cpp
-	src/aigilbst.cpp
-	src/aihand.cpp
-	src/aihound.cpp
-	src/aiinnoc.cpp
-	src/aipod.cpp
-	src/airat.cpp
-	src/aispid.cpp
-	src/aitchern.cpp
-	src/aiunicult.cpp
-	src/aizomba.cpp
-	src/aizombf.cpp
-	src/animatesprite.cpp
-	src/asound.cpp
-	src/barf.cpp
-	src/blood.cpp
-	src/callback.cpp
-	src/choke.cpp
-	src/controls.cpp
-	src/credits.cpp
-	src/db.cpp
-	src/dude.cpp
-	src/endgame.cpp
-	src/eventq.cpp
-	src/fire.cpp
-	src/fx.cpp
-	src/gameutil.cpp
-	src/gib.cpp
-	src/globals.cpp
-	src/hudsprites.cpp
-	src/inifile.cpp
-	src/levels.cpp
-	src/loadsave.cpp
-	src/messages.cpp
-	src/mirrors.cpp
-	src/misc.cpp
-	src/nnexts.cpp
-	src/osdcmd.cpp
-	src/player.cpp
-	src/prediction.cpp
-	src/preload.cpp
-	src/qav.cpp
-	src/replace.cpp
-	src/sbar.cpp
-	src/sectorfx.cpp
-	src/seq.cpp
-	src/sfx.cpp
-	src/sound.cpp
-	src/tile.cpp
-	src/trig.cpp
-	src/triggers.cpp
-	src/view.cpp
-	src/warp.cpp
-	src/weapon.cpp
-	src/d_menu.cpp
-)
-
-add_game_library( blood )
diff --git a/source/blood/all.cpp b/source/blood/all.cpp
new file mode 100644
index 000000000..23658ca4d
--- /dev/null
+++ b/source/blood/all.cpp
@@ -0,0 +1,70 @@
+#ifndef NOONE_EXTENSIONS
+#define NOONE_EXTENSIONS
+#endif
+
+#include "src/actor.cpp"
+#include "src/ai.cpp"
+#include "src/aibat.cpp"
+#include "src/aibeast.cpp"
+#include "src/aiboneel.cpp"
+#include "src/aiburn.cpp"
+#include "src/aicaleb.cpp"
+#include "src/aicerber.cpp"
+#include "src/aicult.cpp"
+#include "src/aigarg.cpp"
+#include "src/aighost.cpp"
+#include "src/aigilbst.cpp"
+#include "src/aihand.cpp"
+#include "src/aihound.cpp"
+#include "src/aiinnoc.cpp"
+#include "src/aipod.cpp"
+#include "src/airat.cpp"
+#include "src/aispid.cpp"
+#include "src/aitchern.cpp"
+#include "src/aiunicult.cpp"
+#include "src/aizomba.cpp"
+#include "src/aizombf.cpp"
+#include "src/animatesprite.cpp"
+#include "src/asound.cpp"
+#include "src/barf.cpp"
+#include "src/blood.cpp"
+#include "src/callback.cpp"
+#include "src/choke.cpp"
+#include "src/controls.cpp"
+#include "src/credits.cpp"
+#include "src/db.cpp"
+#include "src/dude.cpp"
+#include "src/endgame.cpp"
+#include "src/eventq.cpp"
+#include "src/fire.cpp"
+#include "src/fx.cpp"
+#include "src/gameutil.cpp"
+#include "src/gib.cpp"
+#include "src/globals.cpp"
+#include "src/hudsprites.cpp"
+#include "src/inifile.cpp"
+#include "src/levels.cpp"
+#include "src/loadsave.cpp"
+#include "src/messages.cpp"
+#include "src/mirrors.cpp"
+#include "src/misc.cpp"
+#include "src/nnexts.cpp"
+#include "src/osdcmd.cpp"
+#include "src/player.cpp"
+#include "src/prediction.cpp"
+#include "src/preload.cpp"
+#include "src/qav.cpp"
+#include "src/replace.cpp"
+#include "src/sbar.cpp"
+#include "src/sectorfx.cpp"
+#include "src/seq.cpp"
+#include "src/sfx.cpp"
+#include "src/sound.cpp"
+#include "src/tile.cpp"
+#include "src/trig.cpp"
+#include "src/triggers.cpp"
+#include "src/view.cpp"
+#include "src/warp.cpp"
+#include "src/weapon.cpp"
+// This includes the VM so it is last
+#include "src/d_menu.cpp"
diff --git a/source/core/def_.cpp b/source/core/def_.cpp
new file mode 100644
index 000000000..1801b958c
--- /dev/null
+++ b/source/core/def_.cpp
@@ -0,0 +1,139 @@
+/*
+** def.cpp
+** Rewritten .def parser free of Build license restrictions.
+**
+**---------------------------------------------------------------------------
+** Copyright 2020 Christoph Oelckers
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+**
+** 1. Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in the
+**    documentation and/or other materials provided with the distribution.
+** 3. The name of the author may not be used to endorse or promote products
+**    derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OFf
+** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**---------------------------------------------------------------------------
+**
+*/  
+
+
+#include "build.h"
+#include "compat.h"
+
+#include "mdsprite.h"  // md3model_t
+#include "buildtiles.h"
+#include "bitmap.h"
+#include "m_argv.h"
+#include "gamecontrol.h"
+#include "palettecontainer.h"
+#include "mapinfo.h"
+#include "sc_man.h"
+
+
+
+
+
+bool ParseDefFile(const char* file, FScanner *parent)
+{
+	int lump = fileSystem.FindFile(file);
+	bool success = false;
+	if (lump == -1)
+	{
+		if (!parent) Printf(PRINT_BOLD, "%sd: file not found\n", file);
+		else parent->ScriptError("%s: file not found\n", file);
+		return false;
+	}
+	FScanner sc;
+	if (parent) sc.symbols = std::move(parent->symbols); // the child parser needs to add to the parent's symbol table so transfer its ownership for the parsing run.
+	sc.OpenLumpNum(lump);
+	sc.SetCMode(true);
+	sc.SetNoOctals(true);
+	sc.SetNoFatalErrors(true);
+	FString str;
+
+	while (sc.GetString())
+	{	
+		if (sc.Compare({"#include", "include"}))
+		{
+			if (!sc.MustGetString())
+				ParseDefFile(sc.String, &sc);
+		}
+		else if (sc.Compare({"#includedefault", "includedefault"}))
+		{
+			ParseDefFile(G_DefaultDefFile(), &sc);
+		}
+		else if (sc.Compare({"#define", "define"}))
+		{
+			parseDefine(sc);
+		}
+		else if (sc.Compare("definetexture"))
+		{
+			parseDefineTexture(sc);
+		}
+		else if (sc.Compare("defineskybox"))
+		{
+            parseDefineSkybox(sc);
+		}
+		else if (sc.Compare("definetint"))
+		{
+            parseDefineTint(sc);
+		}
+		else if (sc.Compare("alphahack")) // why 'hack'?
+		{
+            parseAlphaHack(sc);
+		}
+		else if (sc.Compare("alphahackrange")) // why 'hack'?
+		{
+            parseAlphaHackRange(sc);
+		}
+		if (sc.Compare({"spritecol", "2dcolidxrange"))	// only used by Mapster32 so just read over them and ignore the result
+		{
+            parseDiscard<3>(sc);
+		}
+		else if (sc.Compare("2dcol")) // same here
+		{
+            parseDiscard<4>(sc);
+		}
+		else if (sc.Compare("fogpal"))
+		{
+            parseFogPal(sc);
+		}
+		else if (sc.Compare("nofloorpalrange"))
+		{
+            parseNoFloorpalRange(sc);
+		}
+		else if (sc.Compare("loadgrp"))
+		{
+            parseLoadGrp(sc);
+		}
+		else if (sc.Compare("cachesize") || sc.Compare("shadefactor"))
+		{
+            parseDiscard<1>(sc);
+		}
+		else if (sc.Compare("artfile"))
+		{
+            parseArtFile(sc);
+		}
+
+	}
+	success = true;
+
+	if (parent) parent->symbols = std::move(sc.symbols);
+	return success;
+}
\ No newline at end of file
diff --git a/source/exhumed/CMakeLists.txt b/source/exhumed/CMakeLists.txt
deleted file mode 100644
index e24689f2b..000000000
--- a/source/exhumed/CMakeLists.txt
+++ /dev/null
@@ -1,54 +0,0 @@
-
-set( PCH_SOURCES
-	src/2d.cpp
-	src/anims.cpp
-	src/anubis.cpp
-	src/bubbles.cpp
-	src/bullet.cpp
-	src/cd.cpp
-	src/cheats.cpp
-	src/enginesubs.cpp
-	src/exhumed.cpp
-	src/fish.cpp
-	src/gameloop.cpp
-	src/grenade.cpp
-	src/gun.cpp
-	src/init.cpp
-	src/input.cpp
-	src/items.cpp
-	src/lavadude.cpp
-	src/light.cpp
-	src/lighting.cpp
-	src/lion.cpp
-	src/map.cpp
-	src/menu.cpp
-	src/move.cpp
-	src/movie.cpp
-	src/mummy.cpp
-	src/object.cpp
-	src/osdcmds.cpp
-	src/player.cpp
-	src/queen.cpp
-	src/ra.cpp
-	src/ramses.cpp
-	src/random.cpp
-	src/rat.cpp
-	src/rex.cpp
-	src/roach.cpp
-	src/runlist.cpp
-	src/save.cpp
-	src/scorp.cpp
-	src/sequence.cpp
-	src/set.cpp
-	src/snake.cpp
-	src/sound.cpp
-	src/spider.cpp
-	src/status.cpp
-	src/switch.cpp
-	src/trigdat.cpp
-	src/view.cpp
-	src/wasp.cpp
-	src/d_menu.cpp
-)
-
-add_game_library( exhumed )
diff --git a/source/exhumed/all.cpp b/source/exhumed/all.cpp
new file mode 100644
index 000000000..677466495
--- /dev/null
+++ b/source/exhumed/all.cpp
@@ -0,0 +1,50 @@
+#include "src/2d.cpp"
+#include "src/anims.cpp"
+#include "src/anubis.cpp"
+#include "src/bubbles.cpp"
+#include "src/bullet.cpp"
+#include "src/cd.cpp"
+#include "src/cheats.cpp"
+#include "src/enginesubs.cpp"
+#include "src/exhumed.cpp"
+#include "src/fish.cpp"
+#include "src/gameloop.cpp"
+#include "src/grenade.cpp"
+#include "src/gun.cpp"
+#include "src/init.cpp"
+#include "src/input.cpp"
+#include "src/items.cpp"
+#include "src/lavadude.cpp"
+#include "src/light.cpp"
+#include "src/lighting.cpp"
+#include "src/lion.cpp"
+#include "src/map.cpp"
+#include "src/menu.cpp"
+#include "src/move.cpp"
+#include "src/movie.cpp"
+#include "src/mummy.cpp"
+#include "src/object.cpp"
+#include "src/osdcmds.cpp"
+#include "src/player.cpp"
+#include "src/queen.cpp"
+#include "src/ra.cpp"
+#include "src/ramses.cpp"
+#include "src/random.cpp"
+#include "src/rat.cpp"
+#include "src/rex.cpp"
+#include "src/roach.cpp"
+#include "src/runlist.cpp"
+#include "src/save.cpp"
+#include "src/scorp.cpp"
+#include "src/sequence.cpp"
+#include "src/set.cpp"
+#include "src/snake.cpp"
+#include "src/sound.cpp"
+#include "src/spider.cpp"
+#include "src/status.cpp"
+#include "src/switch.cpp"
+#include "src/trigdat.cpp"
+#include "src/view.cpp"
+#include "src/wasp.cpp"
+// This includes the VM so it is last
+#include "src/d_menu.cpp"
diff --git a/source/games/duke/CMakeLists.txt b/source/games/duke/CMakeLists.txt
deleted file mode 100644
index 8fb47d88f..000000000
--- a/source/games/duke/CMakeLists.txt
+++ /dev/null
@@ -1,53 +0,0 @@
-
-set( PCH_SOURCES
-	src/2d_d.cpp
-	src/2d_r.cpp
-	src/actors.cpp
-	src/actors_r.cpp
-	src/actors_d.cpp
-	src/actors_lava.cpp
-	src/animatesprites_r.cpp
-	src/animatesprites_d.cpp
-	src/bowling.cpp
-	src/ccmds.cpp
-	src/cheats.cpp
-	src/d_menu.cpp
-	src/dispatch.cpp
-	src/flags_d.cpp
-	src/flags_r.cpp
-	src/game.cpp
-	src/game_misc.cpp
-	src/gamedef.cpp
-	src/gameexec.cpp
-	src/gameloop.cpp
-	src/gamevar.cpp
-	src/global.cpp
-	src/hudweapon_d.cpp
-	src/hudweapon_r.cpp
-	src/input.cpp
-	src/noise.cpp
-	src/player.cpp
-	src/player_d.cpp
-	src/player_r.cpp
-	src/player_w.cpp
-	src/premap.cpp
-	src/premap_d.cpp
-	src/premap_r.cpp
-	src/prediction.cpp
-	src/render.cpp
-	src/savegame.cpp
-	src/sbar.cpp
-	src/sbar_d.cpp
-	src/sbar_r.cpp
-	src/sectors.cpp
-	src/sectors_d.cpp
-	src/sectors_r.cpp
-	src/sounds.cpp
-	src/spawn.cpp
-	src/spawn_d.cpp
-	src/spawn_r.cpp
-	)
-
-add_game_library2( duke )
-
-include_directories( src )
diff --git a/source/games/duke/all.cpp b/source/games/duke/all.cpp
new file mode 100644
index 000000000..c540326e5
--- /dev/null
+++ b/source/games/duke/all.cpp
@@ -0,0 +1,21 @@
+#include "src/actors.cpp"
+#include "src/ccmds.cpp"
+#include "src/cheats.cpp"
+#include "src/d_menu.cpp"
+#include "src/dispatch.cpp"
+#include "src/game.cpp"
+#include "src/game_misc.cpp"
+#include "src/gamedef.cpp"
+#include "src/gameexec.cpp"
+#include "src/gameloop.cpp"
+#include "src/global.cpp"
+#include "src/input.cpp"
+#include "src/noise.cpp"
+#include "src/player.cpp"
+#include "src/premap.cpp"
+#include "src/prediction.cpp"
+#include "src/render.cpp"
+#include "src/savegame.cpp"
+#include "src/sbar.cpp"
+#include "src/sectors.cpp"
+#include "src/spawn.cpp"
diff --git a/source/games/duke/all_d.cpp b/source/games/duke/all_d.cpp
new file mode 100644
index 000000000..65c9bf7c0
--- /dev/null
+++ b/source/games/duke/all_d.cpp
@@ -0,0 +1,15 @@
+#include "src/2d_d.cpp"
+#include "src/actors_d.cpp"
+#include "src/animatesprites_d.cpp"
+#include "src/flags_d.cpp"
+#include "src/hudweapon_d.cpp"
+#include "src/player_d.cpp"
+#include "src/player_w.cpp"
+#include "src/premap_d.cpp"
+#include "src/sbar_d.cpp"
+#include "src/sectors_d.cpp"
+#include "src/spawn_d.cpp"
+
+// These global files include names_d.h!
+#include "src/sounds.cpp"
+#include "src/gamevar.cpp"
diff --git a/source/games/duke/all_r.cpp b/source/games/duke/all_r.cpp
new file mode 100644
index 000000000..88e850128
--- /dev/null
+++ b/source/games/duke/all_r.cpp
@@ -0,0 +1,12 @@
+#include "src/2d_r.cpp"
+#include "src/actors_r.cpp"
+#include "src/actors_lava.cpp"
+#include "src/animatesprites_r.cpp"
+#include "src/bowling.cpp"
+#include "src/flags_r.cpp"
+#include "src/hudweapon_r.cpp"
+#include "src/player_r.cpp"
+#include "src/premap_r.cpp"
+#include "src/sbar_r.cpp"
+#include "src/sectors_r.cpp"
+#include "src/spawn_r.cpp"
diff --git a/source/sw/CMakeLists.txt b/source/sw/CMakeLists.txt
deleted file mode 100644
index 258f44b3c..000000000
--- a/source/sw/CMakeLists.txt
+++ /dev/null
@@ -1,67 +0,0 @@
-
-set( PCH_SOURCES
-	src/2d.cpp
-	src/actor.cpp
-	src/ai.cpp
-	src/break.cpp
-	src/bunny.cpp
-	src/cache.cpp
-	src/cheats.cpp
-	src/colormap.cpp
-	src/coolg.cpp
-	src/coolie.cpp
-	src/copysect.cpp
-	src/draw.cpp
-	src/eel.cpp
-	src/game.cpp
-	src/girlninj.cpp
-	src/goro.cpp
-	src/hornet.cpp
-	src/input.cpp
-	src/interpso.cpp
-	src/inv.cpp
-	src/jsector.cpp
-	src/jweapon.cpp
-	src/lava.cpp
-	src/light.cpp
-	src/mclip.cpp
-	src/menus.cpp
-	src/miscactr.cpp
-	src/morph.cpp
-	src/network.cpp
-	src/ninja.cpp
-	src/osdcmds.cpp
-	src/panel.cpp
-	src/player.cpp
-	src/predict.cpp
-	src/quake.cpp
-	src/ripper.cpp
-	src/ripper2.cpp
-	src/rooms.cpp
-	src/rotator.cpp
-	src/save.cpp
-	src/saveable.cpp
-	src/sbar.cpp
-	src/scrip2.cpp
-	src/sector.cpp
-	src/serp.cpp
-	src/skel.cpp
-	src/skull.cpp
-	src/slidor.cpp
-	src/sounds.cpp
-	src/spike.cpp
-	src/sprite.cpp
-	src/sumo.cpp
-	src/text.cpp
-	src/track.cpp
-	src/vator.cpp
-	src/vis.cpp
-	src/wallmove.cpp
-	src/warp.cpp
-	src/weapon.cpp
-	src/zilla.cpp
-	src/zombie.cpp
-	src/d_menu.cpp
-)
-
-add_game_library( sw )
diff --git a/source/sw/all.cpp b/source/sw/all.cpp
new file mode 100644
index 000000000..8087a4922
--- /dev/null
+++ b/source/sw/all.cpp
@@ -0,0 +1,62 @@
+#include "src/2d.cpp"
+#include "src/actor.cpp"
+#include "src/ai.cpp"
+#include "src/break.cpp"
+#include "src/bunny.cpp"
+#include "src/cache.cpp"
+#include "src/cheats.cpp"
+#include "src/colormap.cpp"
+#include "src/coolg.cpp"
+#include "src/coolie.cpp"
+#include "src/copysect.cpp"
+#include "src/draw.cpp"
+#include "src/eel.cpp"
+#include "src/game.cpp"
+#include "src/girlninj.cpp"
+#include "src/goro.cpp"
+#include "src/hornet.cpp"
+#include "src/input.cpp"
+#include "src/interpso.cpp"
+#include "src/inv.cpp"
+#include "src/jsector.cpp"
+#include "src/jweapon.cpp"
+#include "src/lava.cpp"
+#include "src/light.cpp"
+#include "src/mclip.cpp"
+#include "src/menus.cpp"
+#include "src/miscactr.cpp"
+#include "src/morph.cpp"
+#include "src/network.cpp"
+#include "src/ninja.cpp"
+#include "src/osdcmds.cpp"
+#include "src/panel.cpp"
+#include "src/player.cpp"
+#include "src/predict.cpp"
+#include "src/quake.cpp"
+#include "src/ripper.cpp"
+#include "src/ripper2.cpp"
+#include "src/rooms.cpp"
+#include "src/rotator.cpp"
+#include "src/save.cpp"
+#include "src/saveable.cpp"
+#include "src/sbar.cpp"
+#include "src/scrip2.cpp"
+#include "src/sector.cpp"
+#include "src/serp.cpp"
+#include "src/skel.cpp"
+#include "src/skull.cpp"
+#include "src/slidor.cpp"
+#include "src/sounds.cpp"
+#include "src/spike.cpp"
+#include "src/sprite.cpp"
+#include "src/sumo.cpp"
+#include "src/text.cpp"
+#include "src/track.cpp"
+#include "src/vator.cpp"
+#include "src/vis.cpp"
+#include "src/wallmove.cpp"
+#include "src/warp.cpp"
+#include "src/weapon.cpp"
+#include "src/zilla.cpp"
+#include "src/zombie.cpp"
+#include "src/d_menu.cpp"