You and a friend can play through special co-op missions together and up to four players can join up to survive as long as possible in horde mode.
In CROSSFIRE: SIERRA SQUAD, you are the leader of an elite fireteam in the middle of a war over a top-secret biochemical weapon that has recently been discovered. Who is responsible for this weapon and for what reason? Be prepared for fierce resistance from all sides as you battle a variety of crafty enemies and a relentless search for the truth.
This page contains co-op info for CROSSFIRE: SIERRA SQUAD on the PC. All information about CROSSFIRE: SIERRA SQUAD was correct at the time of posting. Information is subject to change. If you see any errors please email us.