I remember Dungeon Keeper was the first time I ever “hacked” something, I had a demo of Dungeon Keeper that I’d downloaded over 56K, and couldn’t afford the game at 14 or so, but by looking at the config files realized all the characters and their stats were in there, so I was able to unlock all of the units, only without their art assets! Invisible giants were walking around my dungeon doing my bidding. I was very proud of myself and spent many dozens of hours playing this demo because of this, and it probably helped lead me to becoming a software engineer eventually.