Valve Corporation · Valve^*

Half-Life: Source

2004 first-person shooter · shooter game^*

Where and when.

2004-11-16
Date precision
Exact date
Platform
Microsoft Windows
2013-09-12
Date precision
Exact date
Platform
macOS
2013-09-12
Date precision
Exact date
Platform
Linux
2004-06-01 · Microsoft Windows^*
Release date
2004-06-01^*
Date precision
Exact date^*
Platform
Microsoft Windows^*

* Provisional data