diff --git a/doomsday/plugins/common/include/common.h b/doomsday/plugins/common/include/common.h
new file mode 100644
index 0000000000..e5b7436225
--- /dev/null
+++ b/doomsday/plugins/common/include/common.h
@@ -0,0 +1,39 @@
+/**\file
+ *\section License
+ * License: GPL
+ * Online License Link: http://www.gnu.org/licenses/gpl.html
+ *
+ *\author Copyright © 2011 Jaakko Keränen <jaakko.keranen@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#ifndef __COMMON_GAME_INCLUDES__
+#define __COMMON_GAME_INCLUDES__
+
+#if __JDOOM__
+#  include "jdoom.h"
+#elif __JDOOM64__
+#  include "jdoom64.h"
+#elif __JHERETIC__
+#  include "jheretic.h"
+#elif __JHEXEN__
+#  include "jhexen.h"
+#elif __JSTRIFE__
+#  include "jstrife.h"
+#endif
+
+#endif // __COMMON_GAME_INCLUDES__
diff --git a/doomsday/plugins/common/include/d_netsv.h b/doomsday/plugins/common/include/d_netsv.h
index b304082c59..6bedbe1a2e 100644
--- a/doomsday/plugins/common/include/d_netsv.h
+++ b/doomsday/plugins/common/include/d_netsv.h
@@ -25,17 +25,7 @@
 #ifndef __D_NETSV_H__
 #define __D_NETSV_H__
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#elif __JSTRIFE__
-#  include "jstrife.h"
-#endif
+#include "common.h"
 
 extern char     cyclingMaps, mapCycleNoExit;
 extern int      netSvAllowCheats;
diff --git a/doomsday/plugins/common/include/g_common.h b/doomsday/plugins/common/include/g_common.h
index dc9c0704f9..379f1fba95 100644
--- a/doomsday/plugins/common/include/g_common.h
+++ b/doomsday/plugins/common/include/g_common.h
@@ -31,18 +31,7 @@
 
 #include "dd_share.h"
 #include "g_controls.h"
-
-#if __JDOOM__
-# include "jdoom.h"
-#elif __JDOOM64__
-# include "jdoom64.h"
-#elif __JHERETIC__
-# include "jheretic.h"
-#elif __JHEXEN__
-# include "jhexen.h"
-#elif __JSTRIFE__
-# include "jstrife.h"
-#endif
+#include "common.h"
 
 #define OBSOLETE        CVF_HIDE|CVF_NO_ARCHIVE
 
diff --git a/doomsday/plugins/common/src/am_map.c b/doomsday/plugins/common/src/am_map.c
index 2efaf1cc9b..3e4b6c8b4b 100644
--- a/doomsday/plugins/common/src/am_map.c
+++ b/doomsday/plugins/common/src/am_map.c
@@ -34,18 +34,7 @@
 #include <ctype.h>
 #include <string.h>
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#elif __JSTRIFE__
-#  include "jstrife.h"
-#endif
-
+#include "common.h"
 #include "p_mapsetup.h"
 #include "hu_stuff.h"
 #include "hu_menu.h"
diff --git a/doomsday/plugins/common/src/d_net.c b/doomsday/plugins/common/src/d_net.c
index df725516e9..84e4eadd89 100644
--- a/doomsday/plugins/common/src/d_net.c
+++ b/doomsday/plugins/common/src/d_net.c
@@ -32,18 +32,7 @@
 
 // HEADER FILES ------------------------------------------------------------
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#elif __JSTRIFE__
-#  include "jstrife.h"
-#endif
-
+#include "common.h"
 #include "g_common.h"
 #include "d_net.h"
 #include "p_player.h"
diff --git a/doomsday/plugins/common/src/d_netcl.c b/doomsday/plugins/common/src/d_netcl.c
index 9481da0489..b603d101cd 100644
--- a/doomsday/plugins/common/src/d_netcl.c
+++ b/doomsday/plugins/common/src/d_netcl.c
@@ -32,16 +32,7 @@
 #include <string.h>
 #include <assert.h>
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#endif
-
+#include "common.h"
 #include "am_map.h"
 #include "p_saveg.h"
 #include "d_net.h"
diff --git a/doomsday/plugins/common/src/d_netsv.c b/doomsday/plugins/common/src/d_netsv.c
index a91404f7a6..a6ab65828f 100644
--- a/doomsday/plugins/common/src/d_netsv.c
+++ b/doomsday/plugins/common/src/d_netsv.c
@@ -33,16 +33,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#endif
-
+#include "common.h"
 #include "d_net.h"
 #include "p_svtexarc.h"
 #include "p_player.h"
diff --git a/doomsday/plugins/common/src/dmu_lib.c b/doomsday/plugins/common/src/dmu_lib.c
index fb18a58866..bd5c45c688 100644
--- a/doomsday/plugins/common/src/dmu_lib.c
+++ b/doomsday/plugins/common/src/dmu_lib.c
@@ -31,18 +31,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#if __JDOOM__
-#  include "jdoom.h"
-#elif __JDOOM64__
-#  include "jdoom64.h"
-#elif __JHERETIC__
-#  include "jheretic.h"
-#elif __JHEXEN__
-#  include "jhexen.h"
-#elif __JSTRIFE__
-#  include "jstrife.h"
-#endif
-
+#include "common.h"
 #include "dmu_lib.h"
 
 // MACROS ------------------------------------------------------------------