| App Type | game |
| Release Date | Jan 25, 2022 |
| Details Last Modified | June 19, 2026 (4 months ago) |
| Developer | Croteam, Timelock Studio |
| Publisher | Devolver Digital, Croteam Official |
| Genres | Action, Adventure |
| Supported Systems |
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| Windows |
| Price | $19.99 |
| Required Age | 0+ |
| Metacritic | 70/100 |
| Recommendations | 4,534 |
| Achievements | 51 |
| DLC Available | 1 |
| Packages | 2 |
| Website | http://www.serioussam.com |
| Support Email | support@croteam.com |
Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.
Co-op
Family Sharing
Full controller support
Includes level editor
Multi-playerOnline Co-op