diff --git a/mk/linux/build-mg.sh b/mk/linux/build-mg.sh
index cd85c5c6..9b68bb0a 100755
--- a/mk/linux/build-mg.sh
+++ b/mk/linux/build-mg.sh
@@ -89,6 +89,7 @@ CLANG_BIN_PATH=$( which clang 2>/dev/null )
 CLANGPP_BIN_PATH=$( which clang++ 2>/dev/null )
 
 cd ${SCRIPTDIR}
+./mg-version-synch.sh >/dev/null
 
 # Google breakpad integration (cross platform memory dumps) - OPTIONAL
 # Set this to the root path of your Google breakpad subversion working copy.
diff --git a/mk/linux/mg-version-synch.sh b/mk/linux/mg-version-synch.sh
index 75863f8f..3e646dc6 100755
--- a/mk/linux/mg-version-synch.sh
+++ b/mk/linux/mg-version-synch.sh
@@ -1,45 +1,106 @@
-#!/bin/bash
+#!/bin/sh
 # Use this script to synchronize other scripts and installers with the version 
 # in mg-version.sh for a Version Release
 # ----------------------------------------------------------------------------
 # Written by Mark Vejvoda <mark_vejvoda@hotmail.com>
-# Copyright (c) 2011 Mark Vejvoda under GNU GPL v3.0+
+# Copyright (c) 2011-2015 Mark Vejvoda under GNU GPL v3.0+
 
 CURRENT_VERSION=`./mg-version.sh --version`
 OLD_VERSION=`./mg-version.sh --oldversion_binary`
-
+VERSION_INFO_FILE="$(dirname "$(readlink -f "$0")")/../../source/version.txt"
+LastCompatibleSaveGameVersion="$(awk -F '=' '/^LastCompatibleSaveGameVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
+MapeditorVersion="$(awk -F '=' '/^MapeditorVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
+G3dviewerVersion="$(awk -F '=' '/^G3dviewerVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
+if [ "$(echo "$CURRENT_VERSION" | grep -v [a-zA-Z])" != "" ]; then modifymore="yes"; else modifymore="no"; fi
+echo
+echo '===== Updating Game ======'
+# const string glestVersionString 	= "v3.12-dev";
+echo 'Game version # before:'
+grep -E '^const string glestVersionString 	= "[^"]*";$' ../../source/glest_game/facilities/game_util.cpp
+sed -i 's/^const string glestVersionString 	= "[^"]*";$/const string glestVersionString 	= "v'$CURRENT_VERSION'";/' ../../source/glest_game/facilities/game_util.cpp
+echo 'Game version # after:'
+grep -E '^const string glestVersionString 	= "[^"]*";$' ../../source/glest_game/facilities/game_util.cpp
+echo
+if [ "$modifymore" = "yes" ]; then
+	# const string lastCompatibleSaveGameVersionString 	= "v3.9.0";
+	echo 'Compatible Save Game version # before:'
+	grep -E '^const string lastCompatibleSaveGameVersionString 	= "[^"]*";$' ../../source/glest_game/facilities/game_util.cpp
+	sed -i 's/^const string lastCompatibleSaveGameVersionString 	= "[^"]*";$/const string lastCompatibleSaveGameVersionString 	= "v'$LastCompatibleSaveGameVersion'";/' ../../source/glest_game/facilities/game_util.cpp
+	echo 'Compatible Save Game version # after:'
+	grep -E '^const string lastCompatibleSaveGameVersionString 	= "[^"]*";$' ../../source/glest_game/facilities/game_util.cpp
+	echo
+fi
+if [ "$modifymore" = "yes" ] && [ "$(git status >/dev/null 2>&1; echo "$?")" -eq "0" ]; then
+	# const string GIT_RawRev			= "$4446.1a8673f$";
+	GitCommitForRelease="`git rev-list HEAD --count`.`git log -1 --format=%h`";
+	echo 'GitCommitForRelease # before:'
+	grep -E '^GitCommitForRelease = "[^"]*";$' "$VERSION_INFO_FILE"
+	grep -E '^const string GIT_RawRev			= "\$[^"$]*\$";$' ../../source/glest_game/facilities/game_util.cpp
+	sed -i 's/^GitCommitForRelease = "[^"]*";$/GitCommitForRelease = "'$GitCommitForRelease'";/' "$VERSION_INFO_FILE"
+	sed -i 's/^const string GIT_RawRev			= "$[^"]*";$/const string GIT_RawRev			= "$'$GitCommitForRelease'$";/' ../../source/glest_game/facilities/game_util.cpp
+	echo 'GitCommitForRelease # after:'
+	grep -E '^GitCommitForRelease = "[^"]*";$' "$VERSION_INFO_FILE"
+	grep -E '^const string GIT_RawRev			= "\$[^"$]*\$";$' ../../source/glest_game/facilities/game_util.cpp
+fi
+echo
+if [ "$modifymore" = "yes" ]; then
+	echo '===== Updating Mapeditor ======'
+	# const string mapeditorVersionString = "v1.6.1";
+	echo 'Mapeditor version # before:'
+	grep -E '^const string mapeditorVersionString = "[^"]*";$' ../../source/glest_map_editor/main.cpp
+	sed -i 's/^const string mapeditorVersionString = "[^"]*";$/const string mapeditorVersionString = "v'$MapeditorVersion'";/' ../../source/glest_map_editor/main.cpp
+	echo 'Mapeditor version # after:'
+	grep -E '^const string mapeditorVersionString = "[^"]*";$' ../../source/glest_map_editor/main.cpp
+	echo
+	echo '===== Updating G3dviewer ======'
+	# const string g3dviewerVersionString= "v1.3.6";
+	echo 'G3dviewer version # before:'
+	grep -E '^const string g3dviewerVersionString= "[^"]*";$' ../../source/g3d_viewer/main.cpp
+	sed -i 's/^const string g3dviewerVersionString= "[^"]*";$/const string g3dviewerVersionString= "v'$G3dviewerVersion'";/' ../../source/g3d_viewer/main.cpp
+	echo 'G3dviewer version # after:'
+	grep -E '^const string g3dviewerVersionString= "[^"]*";$' ../../source/g3d_viewer/main.cpp
+fi
+echo
 echo '===== Updating Linux Installer ======'
 # local GAME_VERSION = "x.x.x";
 echo 'Linux Installer version # before:'
-grep -E '^local GAME_VERSION = "[^"]*";$' mojosetup/megaglest-installer/scripts/config.lua;sed -i 's/^local GAME_VERSION = "[^"]*";$/local GAME_VERSION = "'$CURRENT_VERSION'";/' mojosetup/megaglest-installer/scripts/config.lua
+grep -E '^local GAME_VERSION = "[^"]*";$' mojosetup/megaglest-installer/scripts/config.lua
+sed -i 's/^local GAME_VERSION = "[^"]*";$/local GAME_VERSION = "'$CURRENT_VERSION'";/' mojosetup/megaglest-installer/scripts/config.lua
 echo 'Linux Installer version # after:'
 grep -E '^local GAME_VERSION = "[^"]*";$' mojosetup/megaglest-installer/scripts/config.lua
-
+echo
 echo '===== Updating Windows Installer ======'
 # !define APVER 3.6.0
 echo 'Windows Installer version # before:'
-grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi;sed -i 's/^\!define APVER [^"]*$/\!define APVER '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestInstaller.nsi
+grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi
+sed -i 's/^\!define APVER [^"]*$/\!define APVER '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestInstaller.nsi
 echo 'Windows Installer version # after:'
 grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi
-
-echo 'Windows Installer version # before:'
-grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi;sed -i 's/^\!define APVER_OLD [^"]*$/\!define APVER_OLD '$OLD_VERSION'/' ../windoze/Installer/MegaGlestInstaller.nsi
-echo 'Windows Installer version # after:'
-grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi
-
-echo '===== Updating Windows Updater ======'
-echo 'Windows Updater version # before:'
-grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi;sed -i 's/^\!define APVER [^"]*$/\!define APVER '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
-echo 'Windows Updater version # after:'
-grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
-
-echo 'Windows Updater version # before:'
-grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi;sed -i 's/^\!define APVER_OLD [^"]*$/\!define APVER_OLD '$OLD_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
-echo 'Windows Updater version # after:'
-grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
-
-grep -E '^\!define APVER_UPDATE [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi;sed -i 's/^\!define APVER_UPDATE [^"]*$/\!define APVER_UPDATE '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
-echo 'Windows Updater version # after:'
-grep -E '^\!define APVER_UPDATE [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
-
-
+echo
+if [ "$modifymore" = "yes" ]; then
+	echo 'Windows Installer version # before:'
+	grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi
+	sed -i 's/^\!define APVER_OLD [^"]*$/\!define APVER_OLD '$OLD_VERSION'/' ../windoze/Installer/MegaGlestInstaller.nsi
+	echo 'Windows Installer version # after:'
+	grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestInstaller.nsi
+	echo
+	echo '===== Updating Windows Updater ======'
+	echo 'Windows Updater version # before:'
+	grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	sed -i 's/^\!define APVER [^"]*$/\!define APVER '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo 'Windows Updater version # after:'
+	grep -E '^\!define APVER [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo
+	echo 'Windows Updater version # before:'
+	grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	sed -i 's/^\!define APVER_OLD [^"]*$/\!define APVER_OLD '$OLD_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo 'Windows Updater version # after:'
+	grep -E '^\!define APVER_OLD [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo
+	echo 'Windows Updater version # before:'
+	grep -E '^\!define APVER_UPDATE [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	sed -i 's/^\!define APVER_UPDATE [^"]*$/\!define APVER_UPDATE '$CURRENT_VERSION'/' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo 'Windows Updater version # after:'
+	grep -E '^\!define APVER_UPDATE [^"]*$' ../windoze/Installer/MegaGlestUpdater.nsi
+	echo
+fi
diff --git a/mk/linux/mg-version.sh b/mk/linux/mg-version.sh
index c37441dc..4924e9ff 100755
--- a/mk/linux/mg-version.sh
+++ b/mk/linux/mg-version.sh
@@ -1,12 +1,13 @@
-#!/bin/bash
+#!/bin/sh
 # Use this script to idenitfy previous and current Version for a Version Release
 # ----------------------------------------------------------------------------
 # Written by Mark Vejvoda <mark_vejvoda@hotmail.com>
 # Copyright (c) 2011 Mark Vejvoda under GNU GPL v3.0+
 
-OLD_MG_VERSION=3.11.0
-OLD_MG_VERSION_BINARY=3.11.0
-MG_VERSION=3.12-dev
+VERSION_INFO_FILE="$(dirname "$(readlink -f "$0")")/../../source/version.txt"
+OLD_MG_VERSION="$(awk -F '=' '/^OldReleaseGameDataVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
+OLD_MG_VERSION_BINARY="$(awk -F '=' '/^OldReleaseGameBinaryVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
+MG_VERSION="$(awk -F '=' '/^CurrentGameVersion =/ {print $2}' "$VERSION_INFO_FILE" | awk -F '"' '{print $2}')"
 
 if [ "$1" = "--oldversion" ]; then
   echo "$OLD_MG_VERSION"
diff --git a/source/version.txt b/source/version.txt
new file mode 100644
index 00000000..f116b51a
--- /dev/null
+++ b/source/version.txt
@@ -0,0 +1,21 @@
+# How it currently works?
+# Set version here (only here) and just start build on linux. Versions will be
+# updated everywhere automatically, but if CurrentGameVersion is a "dev" then
+# only game version will be automatically updated (saving time during rebuild
+# and for cleaner "git status").
+#
+# Then you should on the occasion commit changed files (this step should/will
+# disappear someday, during later improvements).
+
+CurrentGameVersion = "3.12-dev";
+# ^ typical version numbers look like this: "3.11-beta1.0", "3.12-dev", "3.12.0"
+
+OldReleaseGameBinaryVersion = "3.11.0";
+OldReleaseGameDataVersion = "3.11.0";
+LastCompatibleSaveGameVersion = "3.9.0";
+
+MapeditorVersion = "1.6.1";
+G3dviewerVersion = "1.3.6";
+
+GitCommitForRelease = "4446.1a8673f";
+# ^ will be automatically generated