This pack adds 6 new aliens to The Warp for even more replayability. The aliens can be used as Player races, Exiled races or Warp Guardians. Included aliens: Orgu Scientists Nera Seers Gul Architects Vens Enforcers Caler Sentinels Fal Bounty Hunters This expansion is also playable with the 5/6 player expansion. You need the base game to play. —description from the publisher