In Dark Sector, players assume the role of a soldier in the war against the alien race known as the Goa'uld. The game takes place in a large, open world environment, and features a variety of enemy types and obstacles. Players can also use the environment to their advantage, by hiding in trees or buildings, or using the environment to their advantage, by hiding in trees or buildings. The game is set in a future where the Earth has been devastated by a cataclysm, and the only hope for humanity is to find a way to send a fleet of warships to rescue the planet. The game also features a variety of multiplayer modes, including co-operative multiplayer, competitive multiplayer, and deathmatch.