1977 · Eon Products, Inc. (Eon)
Add to the base game:
10 new alien powers (Crystal, Dictator, Grudge, Magnet, Parasite, Plant, Seeker, Skeptic, Will, Worm)
1 system hex, 4 star discs, and 20 tokens for a fifth player (originally silver, later orange)
Expands:
Cosmic Encounter
Other expansions:
Cosmic Encounter: Expansion Set #2
Cosmic Encounter: Expansion Set #3
Cosmic Encounter: Expansion Set #4
Cosmic Encounter: Expansion Set #5
Cosmic Encounter: Expansion Set #6
Cosmic Encounter: Expansion Set #7
Cosmic Encounter: Expansion Set #8
Cosmic Encounter: Expansion Set #9
