Nightmare Forest: Alien Invasion is a stand alone expansion of the Nightmare Forest Universe. You and your friends have returned to the forest and found it overrun with Alien invaders. You realize that you only have so much time to work with your friends to defeat the invading Aliens before they summon the rest of their forces and conqueror the planet. Nightmare Forest: Alien Invasion is a Cooperative game, where players must work together to cleanse the forest of Aliens before it is too late! Each turn, players will move their character(s) around the Forest and decide which Forest Cards to flip over to potentially expose Aliens, fiendish Traps, useful Gear, or valuable Allies.