Not Alone is an asymmetrical card game, in which one player (the Creature) plays against the stranded explorers (the Hunted).
If you play as one of the Hunted, you will explore Artemia using Place cards. By playing these and Survival cards, you try to avoid, confuse or distract the Creature until help arrives.
If you play as the Creature, you will stalk and pursue the shipwrecked survivors. By playing your Hunt cards and using the mysterious powers of Artemia, you try to wear down the Hunted and assimilate them to the planet forever.