Bungie, the former Macintosh developer that was purchased by Microsoft to release it’s first person shooter Halo on Xbox and PC, has released it’s popular first person shooter trilogy for free download.

Marathon 2 and Marathon Infinity can be played on the Dreamcast using Bero’s AlephOne port. Marathon 1 is playable on AlephOne through a remake, though as it’s a remake, it doesn’t use the original datafiles.

You can grab the games at the Marathon Trilogy Release Site.