
688(I) Hunter/Killer, the most realistic submarine simulation ever developed for PC. Master the sonar and weapons control systems, learn to develop real target situations and outfit your boat with the latest advanced weaponry. Then use your skills to complete the tour of duty and earn your dolphins to become a true submariner.
Modeled estimate, not a reported figure. How we estimate →
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About
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Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English
Engagement
Hours played at review time, across 41 reviews with recorded playtime.
Reviews
Themes across 41 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
so far works great on windows 11. i dont have much time in but i kinda know a little abt sub sims and im VERY impressed! buy this if ur even curious. caution tho, its very very in depth so enter only if ur serious abt ur sonar lol
Not an easy game to learn, but once you do it will provide hours of realistic and challenging gameplay
Simulador muito próximo ao real. Com alguns conhecimentos básicos, fácil de jogar.
Apprendre, comprendre, finesse, excellent jeu en attendant une version plus moderne
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classic, total classic
Man I loved this game back in the day, "Conn, Sonar: Torpedo in the water bearing 086!
Best submarine game I've ever played. Also the only one I've ever played, but still. I recommend pinning the game to a single core to avoid crashing/freezing (on both Windows and Linux/SteamOS).
One of the finest Nuclear Submarine simulations in the world Based off the original code of Sub Command, the game/simulator started the submarine game genre along with Silent Hunter 1. Both came out around the same time and were both epic in their own right. Looking at 688(I) while playing it's stations, you get the feeling that the US Navy may come to your house and confiscate your PC because of the classified systems that this game and Sub Command revealed. 10 stars for this game still in 2026
Great Old School game for the thinkers out there.
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Trends
Modeled estimate over time, reconstructed from Steam's monthly review histogram.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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