Sega has announced that from next March 18 will be made available on the Marketplace, the new expansion for the FPS Aliens vs Predator named "Swarm Map Pack. The content will cost 560 Microsoft Points and will include four multiplayer maps included in the versions "Hunter" and "Survival" game "Docks" and "Machine" will be playable in Deathmatch, Predator Hunt, Infestation, Species Deathmatch, Deathmatch Mixed Species and Domination, while in "Outpost" and "Hive" a maximum of four players will have to withstand waves of aliens progressively stronger.