
Unknown Worlds Entertainment · released January 22, 2018
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
Sales
13,700,000
all platforms · as of October 16, 2026
Latest Steam CCU
3,806
Steam daily peak · Oct 25, 2026
Steam all-time peak
50,876
Steam concurrent players · Jan 2018
| Date | List price | Paid | Discount |
|---|---|---|---|
| 10/13/2026 | $29.99 | $29.99 | — |
| 10/05/2026 | $29.99 | $7.49 | −75% |
| 09/11/2026 | $29.99 | $29.99 | — |
| 08/31/2026 | $29.99 | $29.99 | — |
| 08/23/2026 | $29.99 | $29.99 | — |
| 08/15/2026 | $29.99 | $29.99 | — |
| 08/07/2026 | $29.99 | $29.99 | — |
| 07/30/2026 | $29.99 | $29.99 | — |
| 07/22/2026 | $29.99 | $29.99 | — |
| 07/14/2026 | $29.99 | $29.99 | — |
| 07/06/2026 | $29.99 | $7.49 | −75% |
| 07/05/2026 | $29.99 | $7.49 | −75% |
| 07/04/2026 | $29.99 | $7.49 | −75% |
| 07/03/2026 | $29.99 | $7.49 | −75% |
| 07/01/2026 | $29.99 | $7.49 | −75% |
| 06/30/2026 | $29.99 | $7.49 | −75% |
| 06/29/2026 | $29.99 | $7.49 | −75% |
| 06/26/2026 | $29.99 | $7.49 | −75% |
| 06/25/2026 | $29.99 | $29.99 | — |
| Country | Paid | Discount |
|---|---|---|
| ArgentinaUSD | $20.99 | — |
| AustraliaAUD | A$44.95 | — |
| AustriaEUR | €29.99 | — |
| BelgiumEUR | €29.99 | — |
| BrazilBRL | R$124.50 | — |
| CanadaCAD | CA$39.99 | — |
| ChileCLP | CLP 20,300 | — |
| ChinaCNY | CN¥149.00 | — |
| ColombiaCOP | COP 110,500 | — |
| Costa RicaCRC | CRC 16,400.00 | — |
| CzechiaCZK | CZK 29.99 | — |
| DenmarkDKK | DKK 29.99 | — |
| FinlandEUR | €29.99 | — |
| FranceEUR | €29.99 | — |
| GermanyEUR | €29.99 | — |
| GreeceEUR | €29.99 | — |
| Hong Kong SAR ChinaHKD | HK$234.00 | — |
| HungaryHUF | HUF 30 | — |
| IndiaINR | ₹1,800.00 | — |
| IndonesiaIDR | IDR 350,999 | — |
| IrelandEUR | €29.99 | — |
| IsraelILS | ₪119.95 | — |
| ItalyEUR | €29.99 | — |
| JapanJPY | ¥4,300 | — |
| KazakhstanKZT | KZT 9,770.00 | — |
| KuwaitKWD | KWD 9.950 | — |
| LuxembourgEUR | €29.99 | — |
| MalaysiaMYR | MYR 89.00 | — |
| MexicoMXN | MX$595.00 | — |
| NetherlandsEUR | €29.99 | — |
| New ZealandNZD | NZ$49.95 | — |
| NorwayNOK | NOK 335.00 | — |
| PeruPEN | PEN 110.00 | — |
| PhilippinesPHP | ₱1,375.00 | — |
| PolandPLN | PLN 133.99 | — |
| PortugalEUR | €29.99 | — |
| QatarQAR | QAR 122.99 | — |
| RomaniaRON | RON 29.99 | — |
| RussiaRUB | RUB 1,800.00 | — |
| Saudi ArabiaSAR | SAR 128.49 | — |
| SingaporeSGD | SGD 40.00 | — |
| SlovakiaEUR | €29.99 | — |
| South AfricaZAR | ZAR 500.00 | — |
| South KoreaKRW | ₩33,700 | — |
| SpainEUR | €29.99 | — |
| SwedenSEK | SEK 29.99 | — |
| SwitzerlandCHF | CHF 34.50 | — |
| TaiwanTWD | NT$899.00 | — |
| ThailandTHB | THB 856.00 | — |
| TürkiyeUSD | $20.99 | — |
| UkraineUAH | UAH 799.00 | — |
| United Arab EmiratesAED | AED 119.00 | — |
| United KingdomGBP | £25.99 | — |
| United StatesUSD | $29.99 | — |
| UruguayUYU | UYU 885.00 | — |
| VietnamVND | ₫595,000 | — |