

Neither can the player construct a town center to make more villagers. Villagers can be earned through razing enemy buildings, but no new castles may be constructed. Compared to standard Random Map games which can last for 4 hours or more, CBA gives players a quick and fun alternative. Due to this, games can be over in less than 20 minutes, and rarely last longer than an hour. It is an extremely fast-paced and exciting game type, requiring no boring resource gathering, focusing instead on military tactics and combat.

A player loses if all of his castles are destroyed. All players start with 4 castles, that automatically spawn their civilization's unique unit (uu) such as British Longbowmen or Japanese Samurai. Castle Blood Auto (CBA) is a popular custom scenario game type for Age of Empires 2 (AoE2).
