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| Published | 2017 |
|---|---|
| Type | Expansion |
| Number of players | 2 - 8 players |
| Average duration | 45 mins. |
| Complexity |  No complexity set. |
| Location |
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Description
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.