Factions are the cornerstone of progression in Marathon. Every faction has a dedicated tree with powerful upgrades that give permanent stat boosts and unlock new items in the Armory.
While you might want to lean into a specific faction as you play the game, there are a few general upgrades in every tree that you must pick up to improve your early game. So here’s how to unlock faction upgrades and the best upgrades to focus on in the early game of Marathon.
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