The chaotic co-op submarine simulator S.O.N.A.R. has been announced

S.O.N.A.R. is a cooperative submarine simulator for 1-4 players where teamwork is crucial, panic is inevitable, and disaster is always just one wrong button away.
Coordinate with your crew to navigate your submarine through combat missions, stealthy infiltrations, and treasure hunts. Fix malfunctions, recalibrate complex systems, and desperately hope the person sitting next to you isn’t just randomly pressing buttons.
S.O.N.A.R. hasn’t yet announced a release date, but you can already request access to a playtest on Steam.
