NAMAKORIUM (ナマコリウム)

Cooperative real-time strategy about sea cucumbers cleaning up polluted oceans

Polyscape Inc. · Released May 18, 2026

Reviews: Very Positive; 92% of 155
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 3 months ago; Jun 30, 2026
Minimum PC: GeForce GTX 1050; 16 GB RAM · 4 GB disk; Full requirements

What is NAMAKORIUM (ナマコリウム)?

You command specialized sea cucumbers left behind by humanity in a real-time strategy game about restoring polluted oceans. Each stage involves gathering resources, constructing buildings, and clearing pollution before food runs out. You can play alone or in online co-op with up to four players.

For you if...

+you enjoy dividing tasks and coordinating plans with friends
+you like refining strategies to finish stages faster

Not for you if...

−you prefer turn-based decisions over managing several units simultaneously
−you dislike balancing cleanup goals against limited supplies

What players say

92% of 155 reviews are positive

Players praise the cooperative planning, cute creature designs, and soundtrack. Some reviewers criticize the visibility of the game's AI-use disclosure.

Screenshots and trailer

NAMAKORIUM (ナマコリウム) system requirements

Minimum: GeForce GTX 1050, 16 GB RAM, 4 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10 or later (64-Bit)
Processor: i5-3570K 3.4 GHz 4 Core
Graphics: GeForce GTX 1050 (2GB)
Memory: 16 GB RAM
Storage: 4 GB available space
DirectX: Version 12
Notes: Internet connection required for multiplayer. SSD required.

Does NAMAKORIUM (ナマコリウム) have co-op or multiplayer?

Yes: co-op online. It also has a single-player mode.

Does NAMAKORIUM (ナマコリウム) run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Some text entry requires manually opening the on-screen keyboard
Some in-game text is small and may be hard to read
All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 24
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, Japanese, Simplified Chinese, Traditional Chinese, Korean, German, Portuguese - Brazil, Russian.

Does NAMAKORIUM (ナマコリウム) use AI-generated content?

Yes. The developers disclose AI-generated content on the game's Steam page:

This game uses AI to generate some of its graphic assets and to assist with translation.

The statement mentions: ArtText & translations

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam