So I remember my early days of game exploitation, I actually had a decent friend who was teaching me and he made a private cheat client for all project insanity based servers, pretty much I could go onto any server and spawn. This was pretty cool to me and thats sort of how I got into hacking.
So when is the first time you exploited anything in a game?
Legend of Zelda: Link's Awakening. I used to pretty much noclip into inaccessable areas from the beginning by zoning onto the next screen and going into the start menu, it pretty much put you at the same spot you zoned in on the other map.