Golden Gun Mode Multiplayer
Tip: When using the Golden gun don't zoom and shoot at the ground or walls near your enemies. The bullets explodes so let them do their job, don't try to get headshots on this one.
If you have a hard time killing the player that holds the golden gun, try using grenades or proximity mines to get him. When you throw a proximity mine beside a player it won't explode if he doesn't move, but you can shoot it to make it go off. For hard to reach places, stay out of sight of the gun holder, throw a proximity mine the closest to his position possible and shoot it. Grenades can do the trick too, I never used them but got killed a couple of times by them while holding one of these hard to reach places.
I think that every map has it's best spots. Here's one of my favorite spot:
Construction Yard: Get the golden gun, climb the latter near it's spawn, get behind the set of walls in front of you in the middle of the roof and always keep moving from one side to the other of this wall, don't expose yourself stay behind that wall. There are only two spots to cover since there's only two latters to get up there, where you came from and the other side where there is a container. I got a 17 kill streak on this map.