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NAMAKORIUM (ナマコリウム)

About this game

NAMAKORIUM is a chaotic, cooperative multiplayer RTS for up to four players.
Command the "sea cleaners"—Namakos (sea cucumbers) left behind by humanity—and clean up the polluted oceans!

Can you reclaim the beautiful sea?
It’s all up to your planning skills, your friends, and your trusty sea cucumbers.
Get ready for a frantic, action-packed ocean cleanup operation!

Organize Your Namako Operation

Command unique Namakos, gather resources, construct buildings, and clear paths—the tasks are many and time is short.
Purify all the pollution before the food runs out!
Will your strategy hold up under pressure and succeed with the team?

Unique Namakos with Special Traits

Shell Namako gathers limestone. Iron Namako is great at mining. Flame Namako and Ice Namako can survive extreme temperatures.
Use their distinct abilities to assign roles and conquer each stage together!

Restore the Ocean’s Beauty

As you decontaminate, corals bloom, sunlight shines through, and the ocean regains vibrant color.
Over 50 types of "Scenic Creatures" will begin to swim in—try to collect them all as you heal the seas!

Beware the “Blight Namako”!

During cleanup, corrupted Namako known as "Blight Namako" may suddenly appear.
They rot your food and drag the ocean back into darkness.
Team up and repel them with the mighty Namako Fusion Cannon!

Features

  • Planning x RTS Gameplay: Strategize based on map structure and control multiple cucumbers simultaneously

  • Chaotic Cooperative Play: Plans may succeed... or hilariously fail—every match brings its own story

  • Online co-op matches where you can easily team up and play with friends or strangers.

  • Over 50 Scenic Creatures: Discover real and fantasy species as you play

  • 8 Unique Stages

  • Stage Titles Based on Clear Time

  • Adorable Sea Cucumbers & a Hidden Post-Apocalyptic Worldview

New stages, mechanics, and more will be added in future updates.

Guidelines for Streaming and Video Posting

  • Streaming and Video Posting: OK (Very welcome!)

  • Monetization: OK

  • Prohibited Streaming Areas: None

  • We would appreciate it if you could include a link to your Steam store page in the description.

Achievements

View all 20
God-Speed Namako

God-Speed Namako

0.2%

Earn a total of 8 Gold Rank clear times.

Aquatic Animal Paradise

Aquatic Animal Paradise

1.0%

Unlock a total of 40 species of Aquatic Animals.

High-Speed Namako

High-Speed Namako

1.9%

Earn a total of 4 Gold Rank clear times.

Let Him Sleep

Let Him Sleep

3.5%

Clear Stage 4 without allowing Blight Namako to appear.

The Pro Beginner

The Pro Beginner

3.8%

Complete How to Play" within 2 minutes and 45 seconds.

NAMAKORIUM (ナマコリウム)

Namako (Sea cucumbers) will save the Earth—NAMAKORIUM is a chaotic, cooperative multiplayer RTS game for up to four players. Command the “cleaners of the sea” —Namako left behind by humanity and work together to clean up the polluted oceans!

Developer

Polyscape Inc.

Publisher

Polyscape Inc.

Release Date

29 January, 2026

Platforms