Marathon 2: Durandel open source 20111201 - Mac free game

Author: Aleph One

Fresh from your triumph on the starship Marathon, you are seized by the rogue computer Durandal to do his bidding in a distant part of the galaxy. Within the ruins of an ancient civilization, you must seek the remnants of a lost clan and uncover their long-buried secrets. Battle opponents ancient and terrible, with sophisticated weapons and devious strategies, all the while struggling to escape the alien nightmare...

This release of Marathon 2: Durandal includes the classic graphics, and revamped high-definition textures and monsters from the Xbox Live Arcade edition.