SiN Episodes is the title of a planned series of
episodic games for the
PC that would have expanded upon the
1998 computer game SiN. A total of nine episodes were planned with only the first one released. Developed by
Ritual Entertainment and powered by the
Source engine, the first episode
"Emergence" was the first computer game by a major developer to both be produced episodically and delivered over the Internet without the intervention of a publisher. This was accomplished through
Valve Corporation's
Steam content delivery system.