Marimo-VS-IAS: Our Friends
The current price is 100% of the way from its all-time low to full price. Seasonal sales have priced it lower.
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Official store prices and labeled keyshop comparisons
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Price history
Accepted price history and recorded lows
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Multi-item packages that include this game
- Marimo-VS-IAS Series From $23.18
About this game
What this game is, in the developer's words
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 (lake balls) in Lake Akan—now part of the sea—fight for survival against various invasive 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.)
Media
Trailers and screenshots straight from the store page
Marimo-VS-IAS: Our Friends price history and current deals
Marimo-VS-IAS: Our Friends for PC currently sells from $19.99 at authorized stores. Its all-time low is $13.99, set on 2026-06-25.
Frequently asked questions
Answered from this game's own price and edition data
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