Cleanse the Hiss-corrupted agent
After the cutscene, interact with the Shelter door and speak to Emily Pope on the other side. After the long cutscene, turn around and interact with the floating Hiss Guard to try and cure them, then speak to Emily Pope again. When the next cutscene finishes, leave the Boardroom and head through the door on the ground floor to the right. Now you're in Dead Letters, on your way to the Communications Department to find the Hotline.
Go through the door behind the boards and enter the Cafeteria, where you'll be greeted by two more hostile Hiss Guards. Drop down to the ground floor and a few more will spawn. Leave through the door in the north-west corner where you'll be greeted by a very red room indeed. Shoot one of the three floating Hiss Guards to deal some damage before they activate, then kill the waves of enemies that spawn. Head up the stairs at the back to cleanse the next Control Point when they're all dead.
Obtaining the Launch ability
Go through the double door on your right toward the Communications Department, follow the corridor down, then head right into the doorway signposted as Pneumatics, where someone gets thrown out of. This is the second object of power; sprint through the room by taking the staircase on your right, then going across the gangway and down the other side to reach and interact with it.
Now you've got the Launch ability, and you've got another alternate reality tutorial to get through. When you come out of it, be prepared for a fight. Use your newfound ability to grab something big and launch it at the swarm of enemies entering through the door at the other end. Kill all the enemies then head out through the same door, kill the final enemy that spawns, and take a right to find another Shelter.
Enter the Communications Dept to find the Hotline
Mantle over the crates blocking the path then follow the hallway round until you come across a Control Point in front of you, and a corpse sat against the wall on your left with Clearance Level 1 on the ground. Pick that up and you can now enter any doors marked with Clearance Level 1, as you'd expect. Claim the Control Point to activate another fast travel spot.
There's another Shelter round the corner halfway up the stairs so head in there for more loot, then go back to the Control Point and through the double doors to enter the Mail Room.
Tommasi boss fight
As soon as you step into the Mail Room, Tommasi will crawl through a crack at the opposite side of the room. Turns out he can fly, because of course he can. He'll start flinging objects at you while hovering in the middle of the room, but it's not a difficult fight. Throw objects back at him and while he'll dodge a lot of them, you can continue to shoot him with your pistol. Watch out for the normal enemies swarming you from the ground floor too.
After the fight, go up the stairs and through the door Tommasi fled through. Grab all the collectibles strewn about then head through the next door and follow it round into the Hotline Chamber. Walk down the long corridor toward the sound of the ringing phone, then pull the hanging cord three times.
Traverse the Oceanview Motel
You'll be teleported to the Oceanview Motel. Go to the opposite end of the corridor and into the far room, then pick up the key on the table. Head back to the other end and use the key on the only door you can interact with. Head inside and pull the hanging cord three times.
You'll be teleported back to the Federal Bureau of Control, but this time there's a walkway to cross. Walk over and interact with the ringing rotary phone. You'll be taken to another tutorial area; all you have to do is reach the phone at the other end by dodging the flickering entities. You can also use Launch to throw debris and stun them.
When you return to the Federal Bureau of Control, run back across the walkway then take a right turn to find the Director's Office. From there, run back to Emily Pope and speak to her in the Boardroom to initiate a cutscene.
Main Missions:
Control walkthrough: Welcome to the Oldest House
Control walkthrough: Unknown Caller
Control walkthrough: Directorial Override
Control walkthrough: Old Boys' Club
Control walkthrough: Threshold
Control walkthrough: My Brother's Keeper
Control walkthrough: The Face of the Enemy
Control walkthrough: Finnish Tango
Control walkthrough: Polaris
Control walkthrough: Take Control
Side Missions:
Control walkthrough: Old Friends
Control walkthrough: Fridge Duty
Control walkthrough: Self-Reflection
Control walkthrough: Mr Tommasi
Control walkthrough: Old Growth
Control walkthrough: A Matter of Time
Control walkthrough: Langston's Runaways
Control walkthrough: The Enemy Within
Control walkthrough: Mold Removal
Control walkthrough: What a Mess (all missions)
