Campaigns are storylines consisting of several maps.


  • Alien Swarm Reactive Drop has ten official campaigns, though only 8 of them have Steam achievements associated with them (Bonus Missions and Deathmatch do not).
  • Alien Swarm Source launched with a single official Campaign, Jacob's Rest.
  • Alien Swarm 2K4 launched with two official campaigns Sigma and Ortega, and later added four community campaigns Phalanx, Upsilon, Telic, and Escape From Rhea.

Official CampaignsEdit

Deleted CampaignsEdit

See alsoEdit