The file format of executable games created using GameMaker 8.1 has been cracked and a GameMaker 8.1 decompiler has been released. Until now games created using, which promised “new, more secure.EXE encryption”, were “safe” from having their source code revealed. This latest release is actually an updated version of the original.

I would imagine that the decompiler could quickly be rendered useless thanks to the system used by YoYo Games to push out regular updates to GameMaker 8.1 users. License Key Twonkymedia here. Or a more speedy game of cat and mouse could ensue. Writing on Twitter prior to 8.1’s release GameMaker developer Mike Dailly described the new encryption as “nothing amazing” but added that it “should block things for a little while” and that he “could even change it with each release”. The GameMaker decompiler was able to turn iOS apps released by YoYo Games into a computer editable Game Maker file.