- Reach the Scablands
- Access Vex Conflux
- Enter The Buried City
- Navigate the Dark
- Find the Vex source
- Destroy the gates
- Terminate the Vex
- Investigate Vex Conflux
- GHOST: The Vex are taking control of the surface to protect the Black Garden. Mars could soon be worse than Venus. We've got to find out where they're coming from.
- GHOST: We need to track down a conflux, like we saw on Venus. There's reports of one not too far from here.
The Guardian travels towards the Scablands.
- GHOST: Once we find out where the Vex are coming from, cut them off, or it's only a matter of time before Mars becomes one of their machines.
The Guardian reaches the Scablands and approaches the conflux.
- GHOST: There's the conflux!
Several Goblins and a Minotaur appear. The Guardian kills them and sends the Ghost to scan the conflux.
- GHOST: This is part of an even bigger surge, coming from below the Buried City. We'd better check it out.
The Guardian makes their way to the Buried City and enters Freehold Station. The entire area is pitch black, so the Ghost activates its flashlight.
- GHOST: Looks like it's going to be dark in here for a while. Just aim for any red eye you see.
Goblins and Hobgoblins spawn in the darkness, and the Guardian fights their way through. They eventually come across a large open area, still lit. Inside, more Vex, including a Cyclops, guard the subway tunnels. The Guardian kills them all and continues further down.
- GHOST: It's like the Vex have dormant networks buried under every planet, waiting to be revived.
The Guardian reaches Tharsis Junction.
- GHOST: They have transfer gates here. Shut them down!
The Guardian destroys the two closest transfer gates.
- GHOST: More gates up ahead!
The Guardian comes across several more transfer gates further down the subway tracks. The Guardian destroys the gates, annihilates the Vex, and kills their leader, the Prohibitive Mind.
- GHOST: That should slow them down!
The Guardian and Ghost notice a conflux in the middle of the area.
- GHOST: A Conflux is still active. Let me check it out.
The Guardian does so, as the Ghost explores.
- GHOST: This isn't an invasion; the Vex are returning home. Something is calling them back to the Black Garden.
The conflux disappears.