The DOME is the game for 2~4 players. With two players, they fight to drop down the opponent's HP to 0 or make opponent's deck out; with 3~4 players, one will be the overlord and sabotage other players. Each player carries his own deck regarding his choice of character. There are four characters -'Lia Backtrack', 'Jerry Netbus', 'Odic Sue' and 'Yellow Dragon'. Each character's deck is optimized to use their own skills. In his turn, player can choose four actions with 3 AP. 1) Download : Draw up to 2 cards. 2) Resource Distribution : Place up to 2 cards on resource pool. 3) Installation : Play a card from hand after paying its cost. 4) Cracking : Crack the central server with your own resource. When player do an action, it can cause the opponent's HP down or force opponent to reduce his own deck. Also some cards already installed can prevent the player from being damaged. Cracking the central server will give the great benefits to who breaks the security track. So if you want to get that benefits, you must be the first one to break the security than your opponent. With 3 or 4 players, players will play with 'Mastermind Rule'. One player will be the Mastermind who will use 8 Mastermind cards. These powerful cards allow Mastermind player to make other players in trouble. So they must to cooperate to down the Mastermind. However, Mastermind is also not easy for he has to accumulate enough energies to use mastermind cards.