Groups

 

Steamworks API

Software entity

The software part that ties a game to the Steam community, matchmaking and other features.

346
games
6
platforms

The first video game about Steamworks API was released on March 27, 2003.

Valve, Tripwire Interactive and 2K Games has published most of these games

Note that releases on Steam do not by default use Steamworks API.
These can be assumed to be tied to your Steam account completely.

This unfortunately may not apply to all releases of a game.

Steam supports Windows, Mac and, to a limited degree, PS3, and Linux.

Steam also distributes digital magazines, certain movies (besides trailers and such), productivity applications (e.g. 3D modeling apps), and some other things. So not everything on Steam CDN is a game.