Apple is offering .Mac members a free version of GarageGames’ Marble Blast game:
“Enjoy a new gift from .Mac: A free download of Marble Blast from GarageGames, a challenging action/arcade game (a US$14.95 value) that earned a four-mice rating from MacWorld. Race marbles along moving platforms, dodging hazards while collecting sparkling treasures and “power-up” enhancements to cut seconds off your racing time. Start at the beginner level and roll your way up to advanced!”
More info here.