How to Download Marimo-VS-IAS: Our Friends

1. Click on the Marimo-VS-IAS: Our Friends download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

Windows Pc Requirements

Minimum:

• Requires a 64-bit processor and operating system
  
• OS: Windows 10
  
• Processor: Intel Core i7-9750H
  
• Memory: 16 GB RAM
  
• Graphics: NVIDIA GeForce GTX 1050 (Laptop)
  
• Storage: 6 GB available space

Recommended:

• Requires a 64-bit processor and operating system
  
• OS: Windows 11
  
• Processor: Intel Core i7‑12700
  
• Memory: 32 GB RAM
  
• Graphics: NVIDIA GeForce RTX 4070 Ti
  
• Storage: 10 GB available space

Linux Requirements

Minimum:

Recommended:

Mac Requirements

Minimum:

Recommended:

A 3D action where marimo moss ball fight to survive. Clear around 60 missions as you explore the lake, uncovering hidden items, information, side quests, and lurking threats… Use mission rewards and collected items to upgrade your marimo and take on powerful enemies!

Evolve!

For our friends――

A 3D action game where marimo algae fight for survival against various Invading Alien Species!

Master a variety of actions, mow down your enemies, and save your friend!

● Overview ●

Save Marimo!

Strengthen your marimo and wipe out the threats closing in on the Marimo――

• Story Mode

  Stage-based game mode.
  Take on around 60 different missions, including defeating enemies, sabotaging their operations, and rescuing or defending your allies.
  Challenge the hard-mode versions of each mission and aim to become the ultimate marimo!

  

• Marimo Upgrades
  Customize your marimo’s abilities freely using items obtained from rewards and exploration!
  Adapting your upgrades to each situation is the key to overcoming powerful enemies and high-difficulty missions...

  

• Field Exploration
  Freely explore the lake to discover hidden items, information, side quests, and lurking dangers.
  The environment may even change as the story progresses…

  

• Training missions to help you get stronger

  Even if you're not used to action games, you're welcome!
  A training mode where you can learn the controls and rules while earning upgrade items.

  

• Unravel the Mystery in an Optional Sub-Story

  How did the Marimo survive in waters where the environment changed so drastically?
  How did the lake end up becoming part of the sea?
  Explore the lake and uncover the truth!

● Story ●

The marimo of Lake Akan once lived peaceful lives.
However, rising water temperatures and a lack of sunlight drastically reduced their numbers. With help from humans, they recovered and began to thrive again.

But after many years, the lake suddenly turned into seawater, wiping out much of its ecosystem. Invading species from the sea threatened the survivors, pushing the marimo to the brink of extinction.

Then, mysterious glowing particles appeared underwater, driving creatures into a frenzy… and granting new power to the remaining marimo.

(This story shares the same world and timeline as the previous title, "Marimo-VS-IAS," but can be fully enjoyed on its own.)

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