Each player represents an alien race that must establish bases in the systems of other aliens. Players take turns making challenges against other players using numbered cards while other players choose to aid the attacker or defender. Fortunes can rise and fall rapidly due to game altering edict cards and the alien powers which confer a unique way to bend or outright break some rules in the game.

There are many versions of Cosmic Encounter, most of which have expansions.

history | show excerpt | excerpt history