Steam

Steam is a digital distribution, digital rights management, multiplayer and communications platform developed by the Valve Corporation. It is used to distribute games and related media online, from small independent developers to larger software houses. Steam also has community features, automated game updates, and in-game voice and chat functionality.

Each Sonic game can be used by the In-Game community feature, allowing you to take screenshots and replays to be posted in the Community Hub.

Sonic the Hedgehog games

 * Sonic & Sega All-Stars Racing (2010)
 * Sonic 3D Blast (2010)
 * Dr. Robotnik's Mean Bean Machine (2010)
 * Sonic the Hedgehog Spinball (2010)
 * Sonic the Hedgehog (1991) (2010)
 * Sonic the Hedgehog 2 (2011)
 * Sonic 3 & Knuckles (2011)
 * Sonic Adventure DX (2011)
 * Sonic Generations (2011)
 * Sonic the Hedgehog 4: Episode I (2012)
 * Sonic CD (2012)
 * Sonic the Hedgehog 4: Episode II (2012)
 * Sonic the Hedgehog 4: Episode Metal (2012)
 * Sonic Adventure 2 (2012)
 * Sonic Adventure 2: Battle (2012)
 * Sonic & All-Stars Racing Transformed (2013)

Trivia

 * All of the Sonic the Hedgehog games Steam has put online are also all available on the Xbox 360 and PlayStation 3.