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 ...
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NuCal Employee ID Location in Tick-Infested Building in Marathon
Introducing Nucaloric is a priority contract in Marathon that will require players to find a NuCal Employee ID in a Tick Infested building.
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