GoldenEye Bugs
1. The Paintbrush Glitch
Load up Dam and play as normal up to the first tower. Before picking up the Sniper Rifle switch to Unarmed. As soon as you pick it up press A three times as quickly as you can. If you did it correctly you will now be holding a "paintbrush." What you're actually seeing is Bond's arm in the wrong orientation. If you switch to another weapon then back to Unarmed the bug will fix itself.
2. Lousy Gas Containment
Play Facility and make your way to that out-of-the-way room with the scientists and gas barrels. Place a Remote Mine on some barrels. Leave the room and go back to the hallway. Let the doors close. Detonate the mine. Even though the game says "Gas leak detected - isolating area." the gas has no trouble escaping! The entire level fills with toxic gas and you will pass away if you don't finish the mission very quickly.
3. Wrong Weapon Model
Start any multiplayer game using the Remote Mines or Timed Mines weapon sets. The AR33 pickups will use the KF7 model on the ground. When you pick them up they'll still act like normal AR33s.