Easy experience...
	Various Trophies...

From the main menu, select the second option, "Play Online", where you can select the parameters of the type of game you wish to join. Select "Deathmatch", any map, and search for games until you find one in progress showing only a few players. These are fairly common. The rest of the players will be made up of bots, which are fairly easy to kill. This results in easy killing streaks, head shots, etc., and in turn more money and experience.

Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Alexander the Great (Bronze)	Capture a total of 100 territories in Domination.
Billy the Kid (Bronze)	Make 100 head shots (any game type).
Death Bringer (Bronze)	Eliminate 1000 enemies (any game types).
Dominating (Bronze)	Capture a total of 150 territories in Domination.
Heavy Counter (Bronze)	Perform a multi-kill with a grenade 3 times (any game types).
Hope Buster (Bronze)	Defuse a bomb or deactivate a missile 10 times.
Insane Sharpshooter (Bronze)	Eliminate 300 enemies only with sniper rifles (any game types).
Legendary Gunslinger (Bronze)	Perform at least one killing spree on all maps.
Master of Mass Destruction (Bronze)	Win one match of each game type in every map.
Priceless (Bronze)	Head shot an objective carrier 10 times.
Raining Shrapnel (Bronze)	Kill 4 enemies with a frag grenade thrown with the grenade launcher.
Sergeant Major of the Army (Bronze)	Reach Level 40.
Specialist (Bronze)	Reach Level 7.
Stop Poking Me! (Bronze)	Successfully knife 50 enemies (any game types).
Supreme Commander (Silver)	Reach Level 72.
Team Savior (Bronze)	As the Team Leader, escape 10 times.
The Ghost Avenger (Bronze)	Take over a CPU and kill your assassin 10 times (offline only).
Ultimate Team Player (Bronze)	Get 500 kill assists (any game types).
War Veteran (Bronze)	Eliminate 100 enemies (any game types).
Welcome to the Family (Bronze)	Win a match (any game types).