There are five different modes in multiplayer. All modes can be found in both Xbox 360 and PC versions of the game. Certain modes cannot be played on all maps. Deathmatch is the only mode where you are alone and not in a team.
Deathmatch
There are no goals or teams so you are on your own. The player with the most kills wins; in the case of a tie, best kill/death ratio wins.
Team Deathmatch
Exactly like Deathmatch but you are in teams. One team is the Allies, the other is the Axis.
Capture The Flag
You are put into teams and must capture the flag that is positioned somewhere in the battlefield. The team who has captured the most flags after a certain time limit wins.
Headquarters
Once again you are put into teams, but this time they'll be two capture points shown on your compass. One of these points will turn into an objective star. You must capture this point and set up headquarters. Then you have to defend your headquarters from the other team. If the opposing team beats your team to the HQ, you will have to destroy the HQ by standing next to the HQ or eliminating the other team. By holding on to the headquarters you will gain points at 1pt/sec. Destroying an opposing HQ will yield your team 10 points. Attacking team members have infinite lives, defending players are dead until the HQ is destroyed. The HQ will be destroyed after 120 points are accumulated on that HQ and then 2 new capture points will appear.
Search & Destroy
Allies must plant a bomb on one of the two designated bombsites and defend it until it explodes, or eliminate all Axis players to win. Axis either lets the timer run out, eliminate all enemies, or defuse a planted bomb to win.