Examine the tactical map that’s on the box next to the Sarge.
Examine the laptop.
Search for the black ops team near the asylum. (353, 301)
Recover the Thumper from a backpack. You can find it at (311, 274). The other items can be found in similar areas around the place.
Move deeper into the asylum grounds and try using the Thumper. You just place it down and wait a while for it to spawn a mob. When it does, kill it and move away to an area without a thumper and do the same thing again. You’ll eventually kill enough… They do take a while to spawn.
With the thumper activities done, it’s time to move further in and plant some resonance mines on the walls of the compound. Plant them at the east wall(248, 269), North wall(224, 271), and south wall(244, 240).
Go to the centre of the asylum and trigger the mines to summon an Umbral Swarm. Defeat it.
Explore the mound behind the asylum and kill the Penumbral Brood Matriarch to finish the mission.
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