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Sea Of Radiation 2

Sea Of Radiation 2

Welcome to the perilous nuclear-contaminated waters, where all creatures are mutating. Start as an ordinary small fish, struggling to survive in this toxic sea. Through continuous evolution and adaptation, you will grow into a powerful ocean monster and ultimately become the sole ruler of this ocean

Released Nov 29, 2024 Developer NightWalker Platforms Windows ActionRogue-liteLovecraftianCasualSatire
View on Steam ↗ $5.99 (US · as of 2026-05-13)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

79.4%positive136 reviews
Recommended · 0 found this helpful

“great game love it only need 1 hand so its a relaxing game”

— a player, Steam review · 0 hrs played
Not recommended · 0 found this helpful

“The game is good, fairly mindless fun. I've clearly put plenty of hours into it! Unfortunately, it's buggy as all get out and it isn't very clear what you need to do to unlock maps, etc. During game play, you can get stun locked and all you can do is drift around the map and…”

— a player, Steam review · 27 hrs played
Not recommended · 0 found this helpful

“Do not buy, game is broken and cannot be progressed beyond the first level. It's a shame because it's a very fun game.”

— a player, Steam review · 6 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. History through 2026-07 via SteamCharts; self-collected from the Steam API since Aug 2026.

93all-time peak
0 10 20 2025 2026 No data collected for this period No data collected for this period 18 avg · Dec 2024

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

20achievements
29.8%median completion
5.5%rarest: Treasure hunters
98.6% of players 95.8% of players 92.3% of players 65.6% of players 60.4% of players 55.3% of players 54.8% of players 49.3% of players 41.0% of players 30.7% of players 29.8% of players 28.8% of players 27.8% of players 25.9% of players 19.6% of players 16.4% of players 15.5% of players 15.2% of players 13.2% of players 5.5% of players 98.6% 0% most earned rarest
Almost everyone has
98.6%First time into the sea — Starting the game for the first time
95.8%What is it? — The first time swallowing radioactive material
92.3%I mutated — The first equipment mutation organ
Rarest badges of honor
5.5%Treasure hunters — Open the shell 30 times
13.2%I'm back again — Starting the game from the exhibition hall
15.2%The King of Port — Complete 20 minute Port map

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Mar 31, 2026
Update V2.3.8

1. Fixed the bug where the electric shock sound effect and stone sound effect could not be turned off 2. The parasitic straw is adjusted to only attack targets with a body size greater than or equal t

Feb 02, 2026
Update V2.3.7

1. Fixed a bug where secondary organs were not removed when replacing joints. 2. Fixed a bug where equipped organs would still appear after being disabled during an upgrade. 3. Fixed a bug where the s

Jan 28, 2026
Update 2.3.6

1. Fixed a bug where secondary organs of split joints were not recognized as prerequisite organs. 2. Fixed a bug where the multi-tube feature would not take effect on secondary organs that had already

Jan 10, 2026
Update V2.3.5

1. Fixed a bug where the settlement in Cataclysm mode could result in negative values. 2. Fixed a bug where the level of new organs was reset when replicating joints with equipment.

Nov 18, 2025
Update V2.3.3

1. Fixed the bug where the enemy's health did not automatically regenerate 2. Slightly increased the enemy's melee attack power 3. Fixed the bug where the gene count was not updated promptly after exi

Games like Sea Of Radiation 2

From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

Cursorblade Cursorblade 85.4% · 581 reviews shares Cartoon, Hand Drawn, Rogue Lite, Rogue Like They Breathe They Breathe 83.2% · 841 reviews shares Underwater, Lovecraftian, Nature, Hand Drawn Genome Guardian Genome Guardian 91.6% · 706 reviews shares Rogue Lite, Rogue Like, Survival, Top Down Swallow the Sea Swallow the Sea 97.1% · 1,609 reviews shares Underwater, Lovecraftian, Nature, Survival Gem Defender: Soyjak Survivors Gem Defender: Soyjak Survivors 93.9% · 987 reviews shares Satire, Cartoon, Rogue Like, Survival We Need To Go Deeper We Need To Go Deeper 85.6% · 3,542 reviews shares Underwater, Lovecraftian, Cartoon, Hand Drawn SUNLESS SEA SUNLESS SEA 82.6% · 7,073 reviews shares Lovecraftian, Rogue Lite, Rogue Like, Survival Carto Carto 94.3% · 2,502 reviews shares Nature, Cartoon, Hand Drawn, Top Down

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresAction, Casual, Indie
Player tagsAction · Rogue-lite · Lovecraftian · Casual · Satire · Rogue-like · Thriller · Survival · 2D · Cartoon · Hand-drawn · Relaxing (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Full controller support · Steam Cloud · Family Sharing
LanguagesEnglish * , French, German, Spanish - Spain, Russian, Japanese, Simplified Chinese * , Traditional Chinese * , Portuguese - Portugal, Korean *
ControllerFull support
Achievements20
Minimum system requirements (PC)

Minimum: OS: Windows 11 DirectX: Version 10