
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 →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
About
Stats
Sums Steam only; GOG, Epic publish no volume signal, so the true total is higher by an unknown amount.
| Store | Price | Audience | Score | Chart | Est. revenue |
|---|---|---|---|---|---|
SteamYou are here | $3.79−80% | 215reviews | 81% | — | $22.6K |
| $1.99−80% | 16ratings | 76% | — | not modelled | |
Engagement
Reviews
Themes across 43 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
Quite a unique sub sim.just read the tutorial parts from the manual and play it with dgvoodoo
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
間欠的な三角関数による運動解析(TMA)を覚えてしまえば非常に楽しめるゲームです。 全ての操作(ソーナー、レーダー、運動解析、武器へのデータ入力。艦の操縦)を自分でやっても良いですが、非常に忙しくなります。(そこが醍醐味でもありますが、電卓とメモ帳を手元に置いておくことが必要です) 艦長気分で指揮に徹するのであれば、チート(各センサー&武器スタッフ)は使っても良いと思います。 当方の環境ではしばしばソフトがフリーズする不具合がありましたが、比較的スムーズにキャンペーンモードもクリアできました。 古い時代のソフトであるためアクティブソナー自体が旧世代的であること、また画質も解像度的に難がありますが、本質部分は申し分ないと思います。機器のセンシティブ要素はシビアですので、無茶をするとすぐに故障します。当然ですが某潜水艦漫画の様な無茶な機動はできません。 価格も安いので、潜水艦や運動解析に興味がある方には面白いゲームだと思います。
Media
Related
Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
This and every other Pro feature is free until October 20, 2026. A free account is all it takes.
Reviews, worldwide (the counter carries no country): 0.14/day in the week to Aug 25 → 0/day in the week after.
Reviews, worldwide (the counter carries no country): 0.14/day in the week to Aug 7 → 0/day in the week after.
Reviews, worldwide (the counter carries no country): 0/day in the week to Jul 24 → 0/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English
| $9.99 |
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| — |
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| not modelled |
Matched by title — a reused name can pair the wrong games. * is a critic aggregate. Prices and positions are each store's United States storefront; Epic charts worldwide. Audience and Score too, except Steam's, which is worldwide.
Hours played at review time, across 43 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
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
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Great game! I just love it
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).
classic, total classic
Man I loved this game back in the day, "Conn, Sonar: Torpedo in the water bearing 086!
Oldie but a good one
Selling now
See how fast this game is selling right now — estimated copies and revenue per day from recent review growth.
Players by region
Where this game's players are, estimated from review languages.
Related
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| $4.8M | 3.3K | 76% | $39.99 | |
| $1.5M | 2.5K | 91% | $19.99 |
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
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| $22.6K | 254 | 95% | $4.99 | |
| $22.6K | 147 | 95% | $10.99 | |
| $22.6K | 69 | 99% | $9.99 | |
| $22.6K | 390 | 95% | $2.99 | |
| $22.6K | 478 | 42% | $1.99 | |
| $22.6K | 313 | 98% | $3.99 |