In Defense Grid: The Board Game, a cooperative deck-building game based on the Defense Grid video game franchise, players must face off against waves and waves of aliens as they try to #ProtectTheCores. How you construct your deck for each mission is just as important as where you place your towers and which ones you choose to power each round. Defense Grid: The Board Game includes at least ten missions and six AI characters from which to choose. Over the course of the game, players unlock new AI improvements, AI abilities, towers, and cards that they can use to go for the Gold Medal on each mission as they fight to #ProtectTheCores.