In tactical strategy game Aliens vs Predator: Extinction, players will control the forces of one of three species--Alien, Predator or Human Marine--planning their attack strategy, creating their own custom army and choosing upgrades ranging from vision modes to weapon modifications. Each species offers a unique set of attributes forcing players to master a variety of tactics and play styles in order to be victorious. As Colonial Marines, players will rely on military training and the latest hi-tech weaponry from the Weyland-Yutani Corporation to save the human population of LV-742. The Predators must use their stealth and highly evolved hunting techniques to gain the respect of the council of Ancients. Aliens will attack in hordes to kill their enemies and impregnate them with facehuggers, which evolve into the ultimate weapons. A variety of units will be accessible to the player, from basic infantry to specialised warriors like the Alien Carrier able to carry facehuggers in groups, the Predator Hydra or the Marine Sniper.