About Shroom Siege

Shroom Siege is an Indie, Sports, Action, and Strategy game developed by Upside Down Bird. It was released on the Steam Store by Upside Down Bird.

It can be played and ran on Windows, Mac, and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.

According to Steam’s category system, Shroom Siege supports the following features:

• Single-player
• Full controller support
• PvP
• Multi-player
• Co-op
• Remote Play Together
• Shared/Split Screen Co-op
• Online PvP
• Cross-Platform Multiplayer
• Shared/Split Screen PvP
• Online Co-op
• Shared/Split Screen
• LAN Co-op
• Remote Play on TV
• LAN PvP
• Family Sharing
• Steam Cloud

Media & Sceenshots

Watch the featured video for Shroom Siege and see the latest screenshots from the Steam Store.

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Soures & References

Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Data is enriched, cleansed, verified, and updated in real-time to ensure we surface the most up-to-date information. Learn more about the Steambase approach to data collection.

Shroom Siege data has been sourced from:

• Valve Corporation. (2026, April 3). Shroom Siege on Steam. Steam Store.
• Valve Corporation. (2026, April 3). Shroom Siege. Steam Community Hub.
• Upside Down Bird. (2023, July 9). Shroom Siege. Shroom Siege.