The game includes five multiplayer modes:
Team Deathmatch: Eliminate the players on the opposing team. The team with the highest score wins.
Capture The Flag: Grab the opposing team's flag and deliver it to your base to score the capture. You flag is required at your base to score.
Containment: Capture coolant nodes to overheat and destroy the opposing teams reactor. Controlling both coolant nodes increases the overheat time
Assimilation: The Cloven must eliminate the Maquis forces and assimilate them to their team. The last Maquis to be eliminated ends the round. The player with the highest individual score wins.
Free For All: All players are out for themselves. Eliminate the opposition and the player with the highest score wins.
Tons more information can be found in this video, as well as a look at multiplayer gameplay.