Hackers were kept out for a long time, but then, Stefan or Unix didn't keep updating the software with improovements and stuff and now look what happened
I remember hacking on classic.... lol that was fun... Grabbing the exe trainer thing and then changing objects into different things (Pick up rock-> hid under-> change it to sign!) or perhaps the super throw... or maybe even the uber l33t warp... but remember, that was on CLASSIC.... and a long time ago... lol