ArmA: Combat Operations invites gamers to enter a single-player campaign to complete missions or connect to an online world of combat with room for more than 50 players. Gamers enter 150 square mile battlefields with their choice of weaponry and must complete the objectives discussed in the briefing before the game. Players may walk to their next destination or commandeer helicopters, tanks, and fighter planes. Gamers can also customize and create new missions using a built-in editor. ~ Gracie Leach, All Game Guide