Cute marimo take down waves of invading alien species in this side-scrolling shooter! A 2.5D shooting game that blends classic side-scrolling action with strategic depth-based combat. Target priority and strategy are the keys to achieving high scores!
| App ID | 1820640 |
|---|---|
| App type | Game |
| Developer | JoyPlot |
| Publisher | JoyPlot |
| Homepage | https://marimo-info.net/marimo-vs-ias/ |
| Release date | 2022-01-31 08:06 UTC |
| Release state | released |
| Controller support | full |
| Localized names | japanese マリモ-VS-外来種 |
| Store page | store.steampowered.com/app/1820640 |
| Last store refresh | 5 hours ago |
| # | Executable | Arguments | OS | Description |
|---|---|---|---|---|
| 0 | Marimo-VS-IAS.exe | windows | ||
| 1 | Marimo-VS-IAS.app | macos |
No player history yet. This app is now tracked, so data will appear within about ten minutes.
| Playing now | Not polled yet (never) |
|---|---|
| 24-hour peak | |
| All-time peak (tracked) |
All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.
Loading regional prices…
| Date | Price | Regular | Discount |
|---|---|---|---|
| 2026-09-11 22:08 UTC | $8.99 | $8.99 |
| DLC | AppID | Release | Price |
|---|---|---|---|
| No DLC known for this app. | |||
| Branch | Build ID | Description | Updated | Password |
|---|---|---|---|---|
| public | 8675981 | 2022-05-04 10:58 UTC |
| Depot | Name | OS | Size | Download | Public manifest | Notes |
|---|---|---|---|---|---|---|
| 1820641 | windows | 413.38 MB | 270.69 MB | 4041275902357377599 | ||
| 1820642 | macos | 406.83 MB | 268.82 MB | 2717169998364905828 |
A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.
| Build ID | Branch | Updated | First seen |
|---|---|---|---|
| 8675981 | public | 2022-05-04 10:58 UTC | 5 hours ago |
Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since 2026-09-11 22:08 UTC.
No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.
| Changelist | Apps | Packages | Seen | What changed |
|---|---|---|---|---|
| No changelists recorded for this app yet. | ||||
A brand-new 3D action game, “Marimo-VS-IAS: Our Friends,” is now available, telling the story of Marimo-VS-IAS from another marimo’s perspective!Launch sale now on until April 11!Take advantage of our limited-time launch sale! → Store Page
-Fix minor bugs
-Fixed a bug that charging is not restarted in some scenes when automatic shot is disabled. -Fixed the problem that the marker is not displayed on the lockable target. -Adjusted the movement and attack of some enemies -Fixed a bug that the player moves regardless of the input in some scenes. -Fixed a scrolling bug in the alien species databook
-Improved game performance -Adjusted the difficulty -Changed the placement, behavior, HP, etc. of some objects. -Fixed some bugs in the production and made changes. -Fixed a bug in the behavior of player. -Changed some UI and text -Changed to send the score without opening the ranking -Fixed other bugs
Version 1.1.8 -Changed to record if the score at the time of revival (continue) is high. Version 1.1.7 -Adjusted the placement and behavior of some enemies and fixed bugs -Changed some production expressions -Adjusted the Lock-on Shot speed -Other minor bug fixes are included
-Adjusted the placement and behavior of some enemies and fixed bugs -Changed some production expressions -Adjusted the Lock-on Shot speed -Other minor bug fixes are included
Version 1.1.4 -Fixed the problem that the game was restarted without the continuation screen disappearing. -Fixed a bug where the position would rise more than necessary when firing a charge shot near the ground. -Adjusted the range where lock-on occurs
Version 1.1.3 - Fixed a bug that the dropdown menu would return to the title without closing with the cancel button
Version 1.1.2 -Fixed a bug that charge shots would temporarily stop hitting certain enemies.
Version 1.1.1 -Fixed a bug that some objects were not destroyed normally. -Fixed some enemy attacks
Version 1.1.0 - Supports Steam Input for gamepad operations. You can continue to use the traditional input system by disabling Steam Input from the Steam settings. - Adjusted the volume balance of some sound effects. - Fixed some text. - Fixed the behavior of some enemy objects. - Other minor bugs have been fixed.
Version 1.0.1 Fixed a bug that did not return to the title when the game was quitted in some scenes.
Full appinfo as delivered by Steam PICS, changenumber 34873904. Also at /api/app/1820640/raw.
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