2-8 players
45 minutes
Ages 12+

In Captain Sonar, up to eight players take on roles manning a submarine in a fierce battle against rival players. Captain Sonar: Upgrade One adds new elements to the base game, including five new scenarios, two new weapons, eight erasable markers, and different ways to play the Captain and Radio Operator roles.

You need the base game Captain Sonar to play this expansion.

Here is a an overview of the game: