Halo: Combat Evolved (2001 Video Game)
- The Marathon logo can be on the hull of the Pillar of Autumn, and on the chest of Captain Keyes.
- The architecture in Halo is very similar to Jjaro architecture - the Jjaro were an equally ancient race in Marathon.
- Cortana claims the Master Chief has "gone rampant" if he shoots the Captain - Rampancy being a key concept in Marathon. Cortana also shows signs of Rampancy (arrogance and distain of humans) once installed into Halo's control systems. According to Marathon, installing an AI to a large computer system (as Halo's obviously must be) could cause an AI to become Rampant.
- Marines will occasionally refer to you as a "Mark Five". Marathon's main character was a Mjolnir Mark IV cyborg, and the Master Chief wears Mjolnir Mark V armor.