--- a/src/fios.h
+++ b/src/fios.h
@@ -72,11 +72,19 @@
 	char title[255];      ///< internal name of the game
 };
 
+enum {
+	SORT_ASCENDING  = 0,
+	SORT_DESCENDING = 1,
+	SORT_BY_DATE    = 0,
+	SORT_BY_NAME    = 2
+};
+
 /* Variables to display file lists */
 extern FiosItem *_fios_list; ///< defined in misc_gui.cpp
 extern int _fios_num;        ///< defined in fios.cpp, read_only version of _fios_count
 extern SmallFiosItem _file_to_saveload;
 extern SaveLoadDialogMode _saveload_mode;   ///< defined in misc_gui.cpp
+extern byte _savegame_sort_order;
 
 /* Launch save/load dialog */
 void ShowSaveLoadDialog(SaveLoadDialogMode mode);

--- a/src/genworld.cpp
+++ b/src/genworld.cpp
@@ -39,7 +39,7 @@
 void StartupPlayers();
 void StartupDisasters();
 
-void InitializeGame(int mode, uint size_x, uint size_y);
+void InitializeGame(uint size_x, uint size_y, bool reset_date);
 
 /* Please only use this variable in genworld.h and genworld.c and
  *  nowhere else. For speed improvements we need it to be global, but
@@ -253,7 +253,7 @@
  * @param size_x The X-size of the map.
  * @param size_y The Y-size of the map.
  */
-void GenerateWorld(int mode, uint size_x, uint size_y)
+void GenerateWorld(GenerateWorldMode mode, uint size_x, uint size_y)
 {
 	if (_gw.active) return;
 	_gw.mode   = mode;
@@ -279,7 +279,7 @@
 	GfxLoadSprites();
 	LoadStringWidthTable();
 
-	InitializeGame(IG_NONE, _gw.size_x, _gw.size_y);
+	InitializeGame(_gw.size_x, _gw.size_y, false);
 	PrepareGenerateWorldProgress();
 
 	/* Re-init the windowing system */

--- a/src/genworld.h
+++ b/src/genworld.h
@@ -18,6 +18,14 @@
 	GENERATE_NEW_SEED = (uint)-1, ///< Create a new random seed
 };
 
+/* Modes for GenerateWorld */
+enum GenerateWorldMode {
+	GW_NEWGAME   = 0,    /* Generate a map for a new game */
+	GW_EMPTY     = 1,    /* Generate an empty map (sea-level) */
+	GW_RANDOM    = 2,    /* Generate a random map for SE */
+	GW_HEIGHTMAP = 3,    /* Generate a newgame from a heightmap */
+};
+
 typedef void gw_done_proc();
 typedef void gw_abort_proc();
 
@@ -27,7 +35,7 @@
 	bool wait_for_draw;    ///< Are we waiting on a draw event
 	bool quit_thread;      ///< Do we want to quit the active thread
 	bool threaded;         ///< Whether we run _GenerateWorld threaded
-	int mode;              ///< What mode are we making a world in
+	GenerateWorldMode mode;///< What mode are we making a world in
 	PlayerID lp;           ///< The local_player before generating
 	uint size_x;           ///< X-size of the map
 	uint size_y;           ///< Y-size of the map
@@ -67,7 +75,7 @@
 void GenerateWorldSetCallback(gw_done_proc *proc);
 void GenerateWorldSetAbortCallback(gw_abort_proc *proc);
 void WaitTillGeneratedWorld();
-void GenerateWorld(int mode, uint size_x, uint size_y);
+void GenerateWorld(GenerateWorldMode mode, uint size_x, uint size_y);
 void AbortGeneratingWorld();
 bool IsGeneratingWorldAborted();
 void HandleGeneratingWorldAbortion();

--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -55,7 +55,7 @@
 void InitializeNPF();
 void InitializeOldNames();
 
-void InitializeGame(int mode, uint size_x, uint size_y)
+void InitializeGame(uint size_x, uint size_y, bool reset_date)
 {
 	AllocateMap(size_x, size_y);
 
@@ -69,7 +69,7 @@
 	_cur_tileloop_tile = 0;
 	_settings = _settings_newgame;
 
-	if ((mode & IG_DATE_RESET) == IG_DATE_RESET) {
+	if (reset_date) {
 		SetDate(ConvertYMDToDate(_settings.game_creation.starting_year, 0, 1));
 		InitializeOldNames();
 	}

--- a/src/openttd.h
+++ b/src/openttd.h
@@ -29,21 +29,6 @@
 	SM_LOAD_HEIGHTMAP  = 12,
 };
 
-
-/* Modes for GenerateWorld */
-enum GenerateWorldModes {
-	GW_NEWGAME   = 0,    /* Generate a map for a new game */
-	GW_EMPTY     = 1,    /* Generate an empty map (sea-level) */
-	GW_RANDOM    = 2,    /* Generate a random map for SE */
-	GW_HEIGHTMAP = 3,    /* Generate a newgame from a heightmap */
-};
-
-/* Modes for InitializeGame, those are _bits_! */
-enum InitializeGameModes {
-	IG_NONE       = 0,  /* Don't do anything special */
-	IG_DATE_RESET = 1,  /* Reset the date when initializing a game */
-};
-
 /* Display Options */
 enum {
 	DO_SHOW_TOWN_NAMES    = 0,
@@ -54,15 +39,6 @@
 	DO_WAYPOINTS          = 6,
 };
 
-enum {
-	SORT_ASCENDING  = 0,
-	SORT_DESCENDING = 1,
-	SORT_BY_DATE    = 0,
-	SORT_BY_NAME    = 2
-};
-
-extern byte _savegame_sort_order;
-
 /* In certain windows you navigate with the arrow keys. Do not scroll the
  * gameview when here. Bitencoded variable that only allows scrolling if all
  * elements are zero */

--- a/src/saveload.cpp
+++ b/src/saveload.cpp
@@ -1471,7 +1471,7 @@
 }
 
 /* actual loader/saver function */
-void InitializeGame(int mode, uint size_x, uint size_y);
+void InitializeGame(uint size_x, uint size_y, bool reset_date);
 extern bool AfterLoadGame();
 extern void BeforeSaveGame();
 extern bool LoadOldSaveGame(const char *file);
@@ -1634,7 +1634,7 @@
 
 	/* Load a TTDLX or TTDPatch game */
 	if (mode == SL_OLD_LOAD) {
-		InitializeGame(IG_DATE_RESET, 256, 256); // set a mapsize of 256x256 for TTDPatch games or it might get confused
+		InitializeGame(256, 256, true); // set a mapsize of 256x256 for TTDPatch games or it might get confused
 		if (!LoadOldSaveGame(filename)) return SL_REINIT;
 		_sl_version = 0;
 		_sl_minor_version = 0;
@@ -1747,7 +1747,7 @@
 			/* Old maps were hardcoded to 256x256 and thus did not contain
 			 * any mapsize information. Pre-initialize to 256x256 to not to
 			 * confuse old games */
-			InitializeGame(IG_DATE_RESET, 256, 256);
+			InitializeGame(256, 256, true);
 
 			SlLoadChunks();
 			fmt->uninit_read();