The first hour of CONTROL Resonant is fairly straightforward, but once you get to Central the game opens up a lot more, you’re given multiple missions threads to follow and you’ll start racking up sidequests too.
The first of these side quests can be found immediately after reaching the FBC Field Base, when you’ve got your level 1 clearance security card. You’ll notice there are a few doors around the base that you can now open.
CONTROL Resonant guide: Crossing the Threshold
Head to the Field Hospital first, go in and around the corner to find a body with no head. Call it in using your radio to kickstart this mission, and explore the room to find a medics report of a contagious, head-exploding Threshold disease that you need to investigate.

Next to the glass wall with the body behind it is a cabinet. Approach this and you’ll be able to radio Zoe, at which point you’ll need to go to the security station to find the code for the cabinet. The security station is south of the hospital, it’s bright orange so you can’t miss it.

Inspect the computer on your right, swiping across to the next screen twice until you see the cabinet, which will give you the code so you can head back to the cabinet and open it. Inside is a report giving your details of an expedition team in need of help, and you’ll get two new markers on the map for the docks and dig site.

- Dig Site: Report the headless corpse in the yellow lined square on the floor then pick up the keycard from next to the body once you’re done. Use the yellow room above you and pick up the notes and recordings.
- Loading Docks: When you get there you’ll find a door panel highlighted. Attack this to open the door, head inside and report the headless body as well as the security camera on the back wall.
With both of these done you can head back to the security station upper floor and use the computer tucked away in the corner on your right. Interact with the security footage and you’ll get a new objective.

Don’t beeline to the warehouse as you’ll get blocked by the walls surrounding the field base, so head to the location on the map and use your keycard to exit the area. As you leave you’ll be ambushed by a group of enemies so be prepared.
At the warehouse you’ll notice the icon is pointing upwards but there’s nothing on the roof to interact with. Instead head to the northwest side of the building to find a door you can enter into the warehouse.
Kill the enemies that spawn then use the door to the right of where you entered to find Wilson. When you speak to him don’t forget to mention the footage, then tell him you believe him. You need to take AVP-3 back to the threshold, which was that big yellow square on the floor we saw earlier. The easiest way back is to get onto the roof of the warehouse then dash across the street towards the marker and you’ll be able to drop straight into the threshold, completing the mission.
Afterwards you’ll be given the choice to tell the truth about Wilson’s involvement in this incident or not. I’m not sure if there’s anything other than dialogue changes on offer here, let us know in the comments if you do!
We’ve got a few other CONTROL Resonant guides on the site, including a guide to another early sidequest, plus how you can get the first traversal ability and a runthrough of the difficulty options in Assist Mode.