Co-op survival sandbox built for dividing roles and growing a shared base
S.O.N.A.R. (Submarine Operators Not Actually Ready) is a 1–6 player co-op submarine sim where teamwork is essential, panic is inevitable, and sinking is always one wrong button away. Use sonar, pilot, fight, repair, and pray your friends know what to do.



An effortlessly cozy yet deep world to build up together over weekends.
S.O.N.A.R. (Submarine Operators Not Actually Ready) is a 1–6 player co-op submarine sim where teamwork is essential, panic is inevitable, and sinking is always one wrong button away. Use sonar, pilot, fight, repair, and pray your friends know what to do.
Selected for the Logpier co-op catalog with a 95% positive rating across 300 Steam reviews (Hidden Gem: ≤500 reviews & 90%+ positive). Built for 1–6 Players via Online Co-op (All Players Must Own).
Structured around 2+ hrs (Multi-Session) (Survival / Story Campaign) sessions with drop-in/drop-out anytime into the shared world, making it an easy shortlist contender for game night.
Note: This guide is an AI-assisted curation summary synthesized from public Steam store metadata and user review signals. First-hand squad play notes submitted by community reviewers appear separately below.
The ideal weekend hangout for building a shared world at your own pace.