Operation Ninurta - Eris Portal
Operation Ninurta is a third-person tactical shooter with roguelike elements. Explore an infinite procedural maze on Eris, face mutants and bosses, find three crystal keys, and reactivate the portal to win. With limited ammo, upgrades, and warped realities, strategy is vital.
Last Updated: 1/13/2026
| Steam Price | $4.99 |
| Release Date | 6/26/2025 |
| Developer | Mariani Games |
| Publisher | Mariani Games |
| Steam App Id | 3781380 |
Operation Ninurta - Eris Portal
Operation Ninurta is a third-person tactical shooter with roguelike elements. Explore an infinite procedural maze on Eris, face mutants and bosses, find three crystal keys, and reactivate the portal to win. With limited ammo, upgrades, and warped realities, strategy is vital.
Last Updated: 1/13/2026
- Windows
- Mac
- Linux
About Operation Ninurta - Eris Portal
Operation Ninurta - Eris Portal is an Adventure, Casual, Indie, and Action game developed by Mariani Games. On 6/26/2025, it was released on the Steam Store by Mariani Games.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
It also supports 13 languanges in-game including English, French, Italian, German, and Spanish (Spain). Each language comes with varying levels of support for the in-game interface, audio, and fully translated subtitles.
According to Steam’s category system, Operation Ninurta - Eris Portal supports the following features:
- Custom Volume Controls
- Single-player
- Family Sharing
- Partial Controller Support
- Adjustable Difficulty
- Steam Achievements
- Stereo Sound
- Camera Comfort
- Surround Sound
From the Steam community, Operation Ninurta - Eris Portal has been tagged with the following user tags:
- Action Roguelike
- Procedural Generation
- Third Person
- Roguelite
- Aliens
- 3D
- Shooter
- Perma Death
- Sci-fi
- Indie
- Casual
- Action
- Adventure
- Singleplayer
- Space
Media & Sceenshots
Watch the featured video for Operation Ninurta - Eris Portal and see the latest screenshots from the Steam Store.
Related Packages
Operation Ninurta - Eris Portal is referenced by 1 package in the Steam Store. A package (or sub) is simply an item that can be purchased on Steam.
| Name | Price | Actions |
|---|---|---|
| Operation Ninurta - Eris Portal | $14.44 | View |
Supported Languages and Localizations
Operation Ninurta - Eris Portal is available in 13 different languages with varying levels of support for the in-game interface, audio, and fully translated subtitles.
| Name | Interface | Audio | Subtitles |
|---|---|---|---|
| English | Yes | No | Yes |
| French | Yes | No | Yes |
| Italian | Yes | No | Yes |
| German | Yes | No | Yes |
| Spanish (Spain) | Yes | No | Yes |
| Chinese (Simplified) | Yes | No | Yes |
| Chinese (Traditional) | Yes | No | Yes |
| Korean | Yes | No | Yes |
| Japanese | Yes | No | Yes |
| Polish | Yes | No | Yes |
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Find a new game to play just like Operation Ninurta - Eris Portal through our curated lists. Steambase uses Steam's User Tag and Genre system (and other game stats) to curate a list of the best and most loved games similar to Operation Ninurta - Eris Portal.
Features & Categories
Frequently Asked Questions
Soures & References
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Operation Ninurta - Eris Portal data has been sourced from:
- Valve Corporation. (2026, January 13). Operation Ninurta - Eris Portal on Steam. Steam Store.
- Valve Corporation. (2026, January 13). Operation Ninurta - Eris Portal. Steam Community Hub.
- Mariani Games. (2025, June 2). Operation Ninurta - Eris Portal. Operation Ninurta - Eris Portal.