This is a little bit of older news (I’ve been sitting on it since January), but the past two or three years the Original Mac Games Cup has been held by iDevGames. The winners for the latest contest have been announced.
iDevGames – News – Winners of Original Mac Games (OMG) Cup 2005 Announced
You can download and play for free, all of the winners from the past contest as well as tons of other fun games from here: