[mister_mort]

Some of the hidden stuff in Goldeneye was available without memory hacking, it just required a long sequence of button presses that was unknown for a fair amount of time. I believe stuff like invisibility in multiplayer or the special developer models are only available via button sequences.

[panopticon]

I memorized the invisibility sequence. Grabbing Oddjob and smashing in that invis cheat was a sure way to make everyone hate you at a party. Oddjob was a good pairing because you weren't completely invisible, so his short stature/hitbox made the effect more scummy.