Code review comment for lp:~widelands-dev/widelands/bug-1408775

> I kept the file names in case a change would break savegames.

Should be save I think - win conditions are loaded on game start and then are part of the Lua state and are therefore persisted with the savegame. If the display logic in the menus is not trying to load the files nothing should. I'd say rename the files, but drop the numbers.