Halo and Destiny developers Bungie have released their classic shooter Marathon for free on Steam, with sequels Marathon 2 and Marathon Infinity to follow. The Steam ports are the work of the celebrated Aleph One community developers, who’ve kept Bungie’s old Marathon 2 game engine going as an open source project – and who still have PC ports of all three games available on their own site, if you’d rather not truck with Steam.
Bungie’s original landmark FPS Marathon is now free on Steam
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