Facepunch Studios*
Garry's Mod

Where and when.
- 2006-11-29
- Date precision
- Exact date
- Platform
- Microsoft Windows
- 2010-09-23
- Date precision
- Exact date
- Platform
- macOS
- 2013-06-05
- Date precision
- Exact date
- Platform
- Linux
- 2006-11-29 · Microsoft Windows*
- Release date
- 2006-11-29*
- Date precision
- Exact date*
- Platform
- Microsoft Windows*
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* Provisional data