Go to multiplayer and select "Man with the Golden Gun" in the Archives.
When the game starts someone must get the Golden Gun. When the Golden
Gun has been acquired by someone arm the Golden Gun and then run up to
aone of the boxes that are present and shoot it.
Run into the flame so that it hurts you. Continue to do this on until
you die, when the person dies who had the Golden Gun, it just disappears
and no one can pick it up. And, on the sonar screen it shows that all
players present have the Golden Gun.
If you go to the Facility level and go to where there are two containment
doors to access the gas room, look up above the doors and see a red light
that turns green when you open the door. If you shoot this light three
times it will turn black. But when you open the door again the light
comes back on. You can not bust it out anymore from here.