NAMAKORIUM (ナマコリウム)

NAMAKORIUM (ナマコリウム)

Released May 2026

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!

92% positive · 202 reviews
Not yet
Released, but still in active development
Medium confidence
Active Development
Not yet
Released, but still in active development
Medium confidence
Active Development

Where to buy

Steam $11.99
Can't confirm — worth a look
We couldn't confirm these stores carry this game.
Green Man Gaming Steam key Search IndieGala Steam key Search
Prices in USD, as listed by each store.
Buying through an affiliate store helps support the site

Evaluation

NAMAKORIUM graduated from Early Access to its full 1.0 release on May 18, 2026. The launch added 5 new stages, cosmetic DLC, expanded language support, and a leaderboard reset. All three DLC packs listed on the store were released on that same day. Since the 1.0 launch, the developer has continued shipping updates actively. The ver.1.0.4 update on June 30, 2026 distributed badges from the 3rd Namako Leader Contest and added contest winners to the game's credits — the third in a series of recurring community speedrun events that the developer has been running. Prior to 1.0, the developer published a January 2026 roadmap indicating plans for new stages, new gimmicks, and additional features beyond launch, with the note that further additions were possible depending on the game's popularity. No specific future DLC or named content has been announced for the post-1.0 period, but the developer has maintained a consistent pattern of updates (feature patches, events, and community contests) since release, with the most recent official communication on June 30, 2026 — less than two months before today's date of August 19, 2026. This sustained engagement indicates the game is still receiving active development attention.
Evidence
Ver.1.0.4 update distributed badges and added winner names to credits for the 3rd Namako Leader Contest — the third in a series of recurring community speedrun events.
news post · Jun 30, 2026 source development ongoing
high
Game officially transitioned from Early Access to full 1.0 release, adding 5 new stages, 3 cosmetic DLC packs, and 3 new languages.
news post · May 18, 2026 source content shipped
high

Content

3 of 3 released · no outstanding content

Media

Details

Developer
Publisher
Polyscape Inc.
Achievements
24
Platform
Windows
Controller
partial support
Steam Deck
Playable
Players
Single-player · Multiplayer · Co-op

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!
Plus, Solo Mode lets you choose your style: take it slow and chill, or push for peak efficiency!

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!

Master efficiency in Solo Mode!

Play your way—not just in multiplayer, but solo too!
All stages have been fine-tuned for solo play.
Perfect your strategy and aim for the best time!
Of course, taking it slow and steady is perfectly fine too!

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

  • 16 Unique Stages

  • Stage Titles Based on Clear Time

  • Adorable Sea Cucumbers & a Hidden Post-Apocalyptic Worldview

  • Play Solo Mode: Relaxed or Fully Optimized.

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.

Last evaluated Aug 19, 2026
Something about this evaluation looks wrong Report illegal or harmful content