[savrajsingh]

Game genie was only on regular Nintendo. Those other modes on goldeneye were an Easter egg built into the game, iirc

[marpstar]

You're right that N64 did not have Game Genie (Super Nintendo and Sega Genesis also did), but N64 did have Gameshark, which was the spiritual successor to Game Genie (along with Action Replay). There is a project (https://github.com/JCR64/GoldenEye-007-N64-Gun-Game) that adds games to Goldeneye via Gameshark