S21
Dear passengers: Your train departs from Platform 9 in 20 minutes. Sounds doable. Or does it? An absurd game about the station that will never be finished and won’t let you leave. This game is under construction. Thank you for your understanding.
Last Updated: 8/24/2026
| Developer | Hanging Gardens Interactive |
| Steam App Id | 4953120 |
S21
Dear passengers: Your train departs from Platform 9 in 20 minutes. Sounds doable. Or does it? An absurd game about the station that will never be finished and won’t let you leave. This game is under construction. Thank you for your understanding.
Last Updated: 8/24/2026
- Windows
- Mac
- Linux
About S21
S21 is a game developed by Hanging Gardens Interactive. It was released on the Steam Store.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
According to Steam’s category system, S21 supports the following features:
- Save Anytime
- Subtitle Options
- Steam Cloud
Media & Sceenshots
Watch the featured video for S21 and see the latest screenshots from the Steam Store.
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Features & Categories
Frequently Asked Questions
Soures & References
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S21 data has been sourced from:
- Valve Corporation. (2026, August 24). S21 on Steam. Steam Store.
- Valve Corporation. (2026, August 24). S21. Steam Community Hub.