Captain Sonar

From Board Game Geek: At the bottom of the ocean, no one will hear you scream! In Captain Sonar, you and your teammates control a state-of-the-art submarine and are trying to locate an enemy submarine in order to blow it out of the water before they can do the same to you. Every role is important, and the confrontation is merciless. Be organized and communicate because a captain is nothing without his crew: the Chief Mate, the Radio Operator, and the Engineer.

The two teams sit on opposing sides of the table, and are each allocated a particular role (or roles depending on the number of players) within the submarine: The Captain is responsible for moving the submarine and announcing details of this movement; a player needs to man the Sonar in order to listen to the opposing captain's orders and try locate where their sub may be; another player needs to be working in Munitions to prepare torpedoes, mines and other devices that enable combat.

Captain Sonar can be played in two modes: turn-based or real-time. In the latter set-up, all the members of a team take their actions simultaneously while trying to track what the opponents are doing, too. When a captain is ready to launch an attack, the action pauses for a moment to see whether a hit has been recorded — then play resumes with the target having snuck away while the attacker paused or with bits of metal now scattered across the ocean floor. Multiple maps are included with varying levels of difficulty.