Which Expansion
Cosmic Encounter · Expansion

Cosmic Alliance

Depends on your group

Our take
SU&SD calls it the bad expansion and easiest to skip, but BGG posters say it is the large-group expansion par excellence; its Team Cosmic rules also appear in Odyssey, so it is only needed for 7-8 players.
What you need first
Just the base game
What it adds
20 new aliens, a white player color, 7-8 player large-group cards and Team Cosmic rules.
What it fixes
Lets big groups of 7-8 play the game.

Sources

Last checked 2026-10-08. Spot a mistake? Tell us.