How to complete Introducing Traxus in Marathon

After CyberAcme's got you up and running in Marathon, you'll be able to branch out to other factions: enter the Introducing: Traxus priority contract. As the name suggests, completing this quest will unlock the Traxus faction, letting you take on its anti-UESC tasks and progression tree.

Despite being a very early quest, though, Introducing: Traxus is far from simple, since you need to complete three tasks in a single run on Dire Marsh, and they're not exactly a walk in the park. So, here's what you need to do.