Steam Scream V is on until Nov 2. Spooky games crowd the store this week, so the quieter weeks after it are worth a look.

See what's launching
NAMAKORIUM (ナマコリウム) header image
Released May 18, 2026 $11.99 Very Positive Counts toward your Steam games

NAMAKORIUM (ナマコリウム)

By Polyscape Inc.

Followers —
Reviews 150 Very Positive
Players now 0 Peak today 0
Followers, 30 days — Not enough history yet

About NAMAKORIUM (ナマコリウム)

NAMAKORIUM (ナマコリウム) is a game tagged Casual, Simulation and Strategy by Polyscape Inc., released May 18, 2026. It has 150 Steam reviews (Very Positive). The Steam games most like it include Aery - Calm Mind 2, Argonauts Agency: Pandora's Box and Site Management Simulator.

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!
From the Steam page

Steam's store box shows the price and a buy button. It loads from Steam, which may set its own cookies.

Steam data

Everything Steam lists for NAMAKORIUM (ナマコリウム) · record updated 1 day ago

Steam store

Overview

App ID3866920
Release dateMay 18, 2026
Last change number39595513
Last record update1 day ago

App info

App type
Game
Developer
Polyscape Inc.
Publisher
Polyscape Inc.
Steam profile
Counts toward game count and achievement totals · checked 1 day ago
Technologies
Unity detected

Platforms

Windows 64-bit
Steam Deck
Playable
Controller
Partial support

Features

12
Steam AchievementsMulti-playerCo-opOnline co-opPartial controller supportPlayStation controllersXbox controllersPlayStation controller BluetoothSteam CloudSteam LeaderboardsSingle-playerFamily Sharing

Prices

Price · US$11.99
On sale0 of 41regions right now
Lowest seen · US$11.99Oct 23, 2026
Checked10 hours agoin 41 regions

MalaysiaRMMYR

Every price change is kept from Oct 23, 2026 on. Pick a region below to compare.

Patches

Patch notes

14
  1. Jun 30, 2026 Update ver.1.0.4

    Thank you for your continued support of NAMAKORIUM.We are excited to announce that Version 1.4 has been released today.About BadgesBadges have been awarded to all participants of "The 3rd Namako Leader Contest."Badges were distributed base…

  2. Jun 12, 2026 Update ver.1.0.3

    Thank you very much for your continued support of NAMAKORIUM. We are pleased to announce that the game has been updated to ver1.0.3 today.Event Preparation: Made preparations for an upcoming limited-time event.Rankings Bug Fix: Prevented c…

  3. May 21, 2026 Update ver.1.0.1

    Thank you very much for your continuous support for "NAMAKORIUM". Today, we have released the ver1.0.1 update.Fixed an issue where badges awarded during past limited-time events were not displaying.Fixed other minor bugs.Please update your…

  4. May 18, 2026 Update ver.1.0.0

    Thank you very much for your continued support of "NAMAKORIUM." Today, the game has been updated to ver1.0.0.Added 5 new stagesAdjusted the terrain for some existing stagesAdded cosmetic features and new DLCsRefreshed the leaderboard seaso…

  5. Apr 24, 2026 Update ver.0.4.1

    Thank you for your continued support of NAMAKORIUM.We have released the ver 0.4.1 update today.Update Details:Fixed a bug where names and descriptions for gimmicks in event stages were not displayed correctly when clicked.Fixed an issue wh…

  6. Apr 17, 2026 Update ver.0.4.0

    Thank you very much for your continued support of NAMAKORIUM. The version 0.4.0 update has been released today.\ Added a feature to send preset messages in the join screen.\ Added a feature to swap your base position with other players in …

  7. Mar 24, 2026 Update ver.0.3.2

    Thank you very much for your continued support of "NAMAKORIUM." Today, we have released the update for ver0.3.2.Fixed an issue where the window for driving the "Bad Namako Car" would close automatically when decontamination was completed i…

  8. Mar 20, 2026 Update ver.0.3.1

    Thank you for your continued support of NAMAKORIUM. We have released an emergency update to ver. 0.3.1 today.Fixed a bug in ver. 0.3.0 where the Blight Namako could not be defeated.Please update your game to the latest version, as players …

  9. Mar 19, 2026 Update ver.0.3.0

    Thank you for your continued support of NAMAKORIUM. We are excited to announce that the ver0.3.0 update is now live.Update DetailsAdded 3 new stages:"Bad Namako Driving School""Fast & Furious Bad Namako""Tamatebako Repository"The new stage…

  10. Mar 13, 2026 Update ver.0.2.3

    Thank you for your continued support of NAMAKORIUM.We are excited to announce that Version 0.2.3 has been released today.About BadgesBadges have been awarded to all participants of "The 1st Namako Leader Contest."Badges were distributed ba…

  11. Mar 6, 2026 Update ver.0.2.2.1

    Thank you very much for your continued support of NAMAKORIUM. We have released the ver0.2.2.1 update today.Fixed an issue where the same event-exclusive stage could not be selected after choosing "Select Stage."Note: Please update your gam…

  12. Mar 5, 2026 Update ver.0.2.2

    Thank you very much for your continued support of NAMAKORIUM. We have released the ver0.2.2 update today.Event Preparations: Carried out preparations for upcoming events.Bug Report Fix: Fixed an issue where Japanese text could not be enter…

Builds

1
BuildBranchUpdated
23977207publicJun 30, 2026

Packages & DLC

DLCs

3
IDNamePrice (US)
4583220 Not on the store yet —
4588240 Not on the store yet —
4650760 Not on the store yet —

Depots

Depots

1
IDNameSystemsSizeDownloadManifest
3866921 — Windows 3.49 GB 1.69 GB 7538191251293091674

Branches

1
BranchBuildUpdatedAccess
public 23977207 Jun 30, 2026 Open

Configuration

Install foldersteamapps/common/NAMAKORIUM

Launch options

1
ExecutableArgumentsSystemsDescription
NAMAKORIUM.exe All

Cloud saves

Space per player976.6 KB
Filesup to 10
Save locations2
RootPathPatternSystems
gameinstallNAMAKORIUM_Data/StreamingAssets/SAVEDATA.BINWindows
WinAppDataLocalLowPolyscape/NAMAKORIUM/SAVEDATA.BINWindows

News

  1. Jun 12, 2026 · Community Announcements Event: The 3rd Namako Leader Contest!

    We are excited to announce our first limited-time event: "The 3rd Namako Leader Contest"! This is a speedrun competition where players compete for the fastest clear times on exclusive event stages th…

  2. May 18, 2026 · Community Announcements Full Release Out Now!

    Command Namakos to clean up the ocean in this cooperative multiplayer RTS game (you can play solo too!). "NAMAKORIUM" has officially transitioned from Early Access to its Full Release today!We would …

  3. May 14, 2026 · Community Announcements Full Version Release Set for Monday, May 18th!

    Currently in Early Access, we are excited to announce that the official version of the game will be released on Monsday, May 18th!To celebrate the launch, we will be holding a 40% OFF sale. As this i…

  4. Apr 17, 2026 · Community Announcements Event: The 2nd Namako Leader Contest!

    We are excited to announce our first limited-time event: "The 2nd Namako Leader Contest"! This is a speedrun competition where players compete for the fastest clear times on exclusive event stages th…

  5. Mar 20, 2026 · Community Announcements Steam Spring Sale: 30% OFF!

    NAMAKORIUM is currently 30% OFF as part of the Steam Spring Sale through March 26! We’ve also just released an update today—you can now enjoy 11 different stages in both solo and multiplayer modes.Ar…

  6. Mar 5, 2026 · Community Announcements Event: The 1st Namako Leader Contest!

    We are excited to announce our first limited-time event: "The 1st Namako Leader Contest"! This is a speedrun competition where players compete for the fastest clear times on exclusive event stages th…

Data from public Steam pages, updated daily; 5 days of history. LaunchRivals is not affiliated with Valve or Steam.