DYK

This template can select five random facts out of many options. It needs more facts!

...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 released in 1995?
...that Marathon Infinity was developed by Double Aught, not Bungie?
...that the jjarro were at tau ceti?

The Marathon wiki