Alien Swarm is a free video game that combines cooperative play and squad-level tactics in an epic bug hunt. Players form squads of four IAF Marine classes, and use unlockable weapons with different loadout configurations to fight a variety of aliens. They must battle through environments like icy planets and lava-flooded mining facilities to eradicate the alien infestation. Along with the game comes access to the complete code base for Alien Swarm, which has updates to the Source engine as well as 3rd person camera, depth of field, improved dynamic shadows and other gameplay additions.

Aliens vs. Predator is a video game developed by Rebellion, the same team responsible for the popular 1999 PC classic. In this thrilling and action-packed title, players can choose to take on the roles of Colonial Marines, Predators or Aliens in a unique three-way online multiplayer experience. Each race also has its own single-player campaign mode with storylines that intertwine with each other's paths. The game takes place on planet BG-386 where a human colonist mining group discovers an ancient pyramid containing a sinister secret which awakens nature's deadliest species from centuries of hibernation. Players must do battle as one of these species to survive and be crowned the deadliest creature in the galaxy. As the Colonial Marine, they must fight against all odds using deadly firepower; as Alien they discover what it's like to be feared by others; and as Predator they use exotic weaponry to ambush prey from shadows before going in for trophy kills.