Official media

Multiplayer

Crewing up in co-op, player counts the store page states, the 4v4 PvP mode and how proximity voice and the PA work.

How a crew plays together: getting everyone onto the same free demo, splitting the stations, and keeping voice chat useful through proximity range plus the onboard PA system. This section also covers the player figures the listings give, the advertised 4v4 Team Deathmatch, and the honest gaps in the public documentation.

Multiplayer articles

S.O.N.A.R.: How to Play With Friends in Co-op

How to crew up in S.O.N.A.R.: grab the free Steam demo, split the stations, sort voice chat, and work around the connection snags players hit.

S.O.N.A.R. Player Count: How Many Crew Can Play

S.O.N.A.R. - Submarine Operators Not Actually Ready player count: no public figure before launch, plus the crew and match sizes that the Steam page states.

S.O.N.A.R. Proximity Chat: How Voice and the PA Work

S.O.N.A.R.'s 3D proximity voice chat only carries to nearby crew, so the bridge uses a PA system and an emote wheel to reach the whole sub.

pvp

S.O.N.A.R. carries a PvP tag on Steam. The competitive side is online 4v4 Team Deathmatch between two submarines, alongside the co-op modes.