Comment by vintermann

I had a Loki software demo of Heroes of Might and Magic 3 for Linux. Couldn't find the full game anywhere, certainly not legally. You could only play one scenario with one town. But from saving and comparing save files in a hex editor, I figured out how to play as the other towns, change heroes and skills etc. The key discovery was finding out that the saves were compressed with something very like gzip. The game complained that checksums didn't match when I loaded a decompressed->modified->recompressed save file, but it still worked just fine.