Threshold

In Central Executive, play the tape recorder near the Sector Elevator for Salvador: Security Order.

Check the Board Room table for the Linguistic Ability research.

In an office on the upper level, find Pope's Promotion.

Use a Level 4 keycard to unlock a door upstairs from Central Executive on the way to the Director's Office. Inside, loot a container and examine a folder for Sticky Note Complaint.

Fast travel to Ventilation in Maintenance Sector. Fight Hiss, go to the lower level, and open the Level 4 door to find a break room with a loot container.

Pop into the Janitor's Office to start the side mission What a Mess: Clear the Clog.

Find two power cores in the Coolant Pumps area. Use one to unlock doors, retrieve the second, and then retrieve the first to proceed.

Go up the stairs and activate the Draining Pump, which opens a door at the top.

Head through the new door to the bottom level. Shoot the yellow tendrils of the Clog to receive 3 Ability Points and goodies. Loot the two containers.

Fast travel to NSC Energy Converters Entrance and go to Central Maintenance. Head towards Black Rock Processing.

Before the Level 4 door, go right to a control room. Loot a container and find Tennyson Report Warning in a folder.

Go through the Level 4 door towards the Turbine Room.

Fight Hiss, go downstairs, and loot a container.

Use Launch to remove a power core from the receptacle left of the spinning turbine blades and fire it at the receptacle on the other side to cross.

Go up the stairs. On the far side of the next set of spinning turbine blades, there are two power sockets.

Go back downstairs to find one power core and fire it into one socket.

Take the power core from the left of the turbines and fire it into the other socket. This opens a path ahead.

Go to the end of the path and pull the light switch three times.

Go back to the front desk and ring the bell twice. Enter the second room and arrange the furniture identically to the first: leave the chair, move the radio right, straighten the painting, move the potted plant left.

Enter the third room and pick up the key. Open the Black Pyramid room door and pull the light cord three times.

Head downstairs to where you fought Hiss. Go through Security Check towards the Atlas Chamber and Black Rock Processing. A bridge has formed from your actions in the motel.

In the office area, shoot out the glass of the Level 5 door. Inside, loot a container and find FBC Reminder: Altered Workspace on a tape recorder.

Go into the next office and find the Atlas Theory research on a cupboard. Climb shelves and Air-Evade across to find a loot container.

Go up the stairs and drop into the room below. Unlock the double doors back to Central Maintenance.

Go up the stairs to the Atlas Chamber. Help FBC Rangers fight Hiss, including a Hiss Warped.

Cleanse the Control Point.

Head up the stairs to the left and enter the office at the end to hear Oceanview Motel & Casino.

Go back to where you came up the stairs to find a Shelter.