Every level in GoldenEye has a secret to unlock, if you can beat it within a set target time. If you can accomplish all the objectives and finish before the time is up on the appropriate difficulty setting, you'll be awarded a new cheat code. Here's a list of the ones we've opened up so far:

DK Mode:
Ostensibly "Donkey Kong" mode, this cheat opens up after you beat the target time of Mission 1 - Arkangelsk, Stage 3: The Runway. This code makes the heads of both the player and guards get really large and easy to shoot, sort of like a big monkey.

Invulnerability Mode:
If you beat the stage entitled the "Facility" on the OO Agent difficulty setting, the invulnerability cheat code opens up.

All Gun Mode:
If you beat Egyptian within the target time, you get the "All Guns cheat". This provides the player with every gun and every double of every gun they've seen so far, plus a few extras, such as the taser and the fighting knife. This doesn't include ammo for everything. That's another code.

Other Cheats
Magnum Mode:
Now you can be both James Bond and Dirty Harry. Choose this mode after you've won the game as an Agent, and you'll have a Magnum with you for every open stage.

Extra Multiplayer Stages:
After beating the second Severyna bunker, the military archive, and water cavern stages in Agent mode, the areas open up for multiplayer play for 2-3 people.

Extra Multiplayer Character Options:
After beating the game on Agent Mode, gamers can deathmatch play as such famous Bond film villains as Mayday, Oddjob, Jaws, and Baron Samedi, in addition to every single enemy character in the game.

Aztec Stage:
If you beat the game on the Secret Agent difficulty setting, this extra stage opens up.

Laser Mode:
Once you've beaten the Aztec stage on the OO Agent difficulty setting, the Laser Mode opens up as a cheat option. This gun is just about the best weapon in the game

Egyptian Stage:
If you beat the game on the OO Agent difficulty setting, this extra stage opens up.

How to find the secret 007 mode
007 Mode opens up after you beat every single level (including the hidden Aztec and Egyptian stages) on the 'OO Agent' Difficulty setting. The 007 mode is a level editor where you can configure options such as enemy health, reaction time, accuracy, and more.

Be the game designers, a biker, and even a terrorist!
To get even more people in multiplayer mode like the game designers, bike rider, and the terrorist follow the directions below. You can do this code anywhere, but it's best to do it on the multiplayer character select screen while looking at the last available character (Mishkin or Moonraker Elite).

1.Hold L + R and press C-Left.
2.Hold L and press C-Up.
3.Hold L + R and press LEFT on the Control Pad (not the analog stick.)
4.Hold L and pressRIGHT on the Control Pad.
5.Hold R and press DOWN on the Control Pad.
6.Hold L + R and press C-Left.
7.Hold L and press C-Up.
8.Hold L + R and press RIGHT on the Control Pad.
9.Hold L + R and press C-Down.
10.Hold L and press DOWN on the Control Pad.

Let the mines float!
In a multiplayer game choose the bunker level. Select remote mines as the weapon. Head to the big room with the TV's on the ceiling. Take the mines and throw them on each of the TV's. Make sure they're on the TV's and not the wall. Detonate the mines and now throw another mine. Nothing will happen at first, but when you step back, it will be floating!