UsageTo use the decompiler you simply drag an GM8.1 or GM8.0 executable onto the Decompiler icon and the decompilation process will begin.
GameMaker 8.1 DecompilerThis is the old source code (circa 2011) for the GameMaker 8.1 decompiler.Source expanded on from the original GameMaker 8.0 decompiler with the new (now old) Gmk library replacing the original GMK serialization library.