Castle Siege is a 1-2 player handheld play tower defense card game. In it, each player arranges their entire castle between the fingers of one hand, beginning with just the castle keep. From there, the players play cards to add towers, or to attack their opponents castle with archers, battering rams, explosives, and trolls. Play proceeds with towers and attackers taking damage until one player's keep is destroyed. In solo mode, players lay out their keep and two towers on the table to build a castle. Archer cards make up the active defenses, and attacking cards are drawn from the enemy deck. Their attacks are launched on your towers, your archers and then your keep unless you can successfully fend them all off with your archers. —user summary