One Hour Compo celebrates it's 400th round on Thursday June 9th at 9:00PM EST! Don't miss it!
The ORC was started as a sister competition to PRC. It initially ran with the same rules, the only difference being that the contestants remixed an original piece made by a person on OCR. The first source tune was made by ReactorZ0 to start the competition. From there, whoever won the competition would choose an original tune he/she made to be the source for the next competition. Voting is done by the general public.

Organizer: Doulifee