Instructions
Start Uncharted 2 in your PS3. At the main screen, press "Start."
Select "Multiplayer" from the game's menu.
Select one of the Co-Op options if you want to play on the same team as other players. Your options include Objective, where you must make your way through a map to complete a task, and Arena, where you will try to survive wave after wave of enemy attacks.
Select one of the competitive options if you want to play against other players. In Deathmatch, your team must defeat the other team by scoring more kills. Elimination requires you to eliminate the opposing team within three minutes. During Plunder, you must find treasure and bring it back to your chest. Other options include King of the Hill, Turf War and Chain Reaction.