Sonar

Sonar is an underwater cat-and-mouse game for two teams, and it plays a lot like a deduction duel between submarines. Each team gets its own map, a divider hides your moves, and the first side to deal two points of damage to the other wins on the spot. Teams can be one or two players, and in a pair one is the Captain and one the Radio Operator. The Captain calls out a move, say one space north, and marks the new location, while the other team's Radio Operator tracks the sub's path on a plastic sheet and tries to work out where it is. It is bluff, logic and good listening in a compact box, for two to four players and about half an hour.