http://download.games.com/t_01ac1/s6/MacGames
http://mac.appstorm.net/roundups/games/the-ultimate-list-of-50-free-mac-games/
http://www.downloadfreemacgames.com/
http://www.thriftmac.com/Games/
http://www.gamehouse.com/mac-classic-games
http://guides.macrumors.com/Free_Mac_Games