When I was younger I went to computer camps. We would basically play LAN games the majority of the time.

One year we played Jedi Knight Dark Forces II.

This game was super easy to hack since you would just save a local version of the file and it would override the game.

There was a god mode that you can download which would give your character 1 million in health and never die.

I then modified it so I had a health of 500. This way if I wanted to prove that I could be killed I would just call the kill command 4 times to bring my life back down to 100.