Sea Of Radiation 2

Underwater action roguelite about devouring rivals and evolving a fish

NightWalker · Released Nov 29, 2024

Reviews: Mostly Positive; 79% of 136
Recent reviews: Not enough recent
Playing now: 0; right now
Steam Deck: Playable
Last update: 5 months ago; Mar 31, 2026

Free demo available, 0 playing it now: get the demo.

What is Sea Of Radiation 2?

Sea Of Radiation 2 is a 2D underwater action roguelite in which a small fish tries to survive a radiation-contaminated sea. You eat other creatures and absorb radiation to grow, choosing and repositioning organs to change your creature's abilities. Enemies mutate at random as you progress, and Overlord creatures spawn upgraded foes.

For you if...

+you enjoy customizing a creature's body as it grows
+you like adapting to enemies that mutate unpredictably

Not for you if...

−you prefer fixed abilities over building a creature
−you want enemy encounters to stay predictable

What players say

79% of 136 reviews are positive

Players call the game fun, but several report progress-blocking bugs and unclear objectives.

Screenshots and trailer

Sea Of Radiation 2 system requirements

As published by the developer.

Minimum

OS: Windows 11
DirectX: Version 10

PC version details

DRM, required accounts, controller support and Steam features.

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 20
Steam features: Cloud saves, Family Sharing

Steam Deck: Playable

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some in-game text is small and may be hard to read
Default graphics settings perform well on Steam Deck

Multiplayer and co-op

Single-player

Languages

Full audio: English, Simplified Chinese, Traditional Chinese. Text only: French, German, Spanish - Spain, Russian, Japanese, Portuguese - Portugal, Korean.