Wikipedia is so rich with esoterica that we could probably just post one of the online encyclopedia's entries each day in this space and never run short of supply. But we resist that temptation, for then we'd never find all the good unindexed stuff floating around the Web.
Today, however, is an exception--mostly because we find it funny that it's an open-source project documenting other open-source projects. (Yes, we're easily amused.) So without further jabber, we offer Wikipedia's list of open-source games.