The Legendary Encounters an Alien Deckbuilding Game Complete Core Box by Upper Deck is a board game for 5 players aged 17 years and up. The game features a space-themed design, with players building decks using cards from the Alien character family. With a focus on cooperative gameplay, players must strategize and work together to overcome obstacles and defeat enemies in order to survive. This complete game set includes all the necessary components to start playing right away, making it a perfect addition to any tabletop gaming collection.