DYK

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...that the original trilogy uses impossible space?
...that there are items in the Marathon resource fork named 'COPY OF WINDOWS NT', 'PIRATED COPLAND BETA', 'ALIEN ENERGY CONVERTER', 'WAVE MOTION CANNON', and 'THE PLANS'?
...that Marathon 2: Durandal was available on the Xbox 360, but not Marathon (1994)?
...that Marathon Infinity was released in 1996?
...that Leela estimates her distress message from the UESC Marathon would take ninety-two years to reach Earth, but Tau Ceti is less than 12 lightyears away?

The Marathon wiki