Speed Demos Archive
speeddemosarchive.com (usually refered to as SDA) is an offshoot of the Quake done Quick community's longtime demo site. Nolan "Radix" Pflug opened the Archive to non Quake-related speed runs in March of 2004, and SDA has been the world's top multi-system speed run competition site ever since.
SDA currently contains speed runs for 346 games.