Castle Guard

Castle Guard is based on the old Atari 2600 (and arcade) game called Warlords. The basic premise is that you have to knock down the opponents castle, by batting a large fireball around with your paddle (which can move both horizontally and vertically). You can play against a computer opponent, or another person (there is a 3rd mode, which is computer vs. computer, which is basically a demo mode). Unlike the original version (or other Coco versions such as Tom Mix's War Kings), you do not have to break down a barrier, but you gradually cause the castle to sink completely into the ground.