There are six total factions in Marathon, but only one is unlocked by default, so how do you access the rest of them?

This Marathon quests guide lists every Priority Contract and side mission available in Marathon across all 6 factions.

The "Introducing: Traxus" priority contract in Marathon is, as you'll likely have figured out from the name, required to unlock access to the Traxus faction. It's by far the most difficult quest ...

Introducing: Traxus is a Liaison Priority Contract given to you by CyberAcme. This quest requires you to head to Dire Marsh, the second of Marathon's maps. If you head into Perimeter, you'll be unable ...

What is Code-Based Circuit Design? Circuit-synth brings software engineering practices to hardware design by letting you define circuits in Python code instead of ...