Events of Dead Space 3Edit
Waste Disposal is available on Chapter 14 after Isaac Clarke finds the key in the Geology Sector of the Rosetta Research Lab. The player can head there to see if anything had survived the Scenario Five purge. Indeed, some useful supplies were stored in the deepest part of the warehouse after a quarantine lockdown.
Start off by unlocking the Disposal Services door with a key. It opens up to an elevator. When you're down, you'll find you're in the Disposal Services Tram Station. There's also a bench and a suit kiosk. After that, go down the other elevator right across the hall from where you came in (marked "storage hall").
As you walk down the stairs after leaving the elevator, you'll receive a new optional mission, "Recover anything that survived the purge". Go through the next room, and you will get attacked right on the other side of the door. Fight your way through, then go down the short stairs. There's a text log here with some other supplies. After getting these, turn around and go out the large door at the end of the room. Now, go all the way to the back of this new room (killing exploding necros on the way) to get to the new door to advance.
You are in what looks like a supply closet. Use the elevator in the room to go up. Fight through this room, then use the ladder to climb up a floor. Go through the next two doors until you get to a console that has to be bypassed. Bypass it, and this will cause Necromorphs to attack. Fight through the enemies, and then go through the door that you just opened. Collect the resources here, and move to the next room: the Refuse Disposal Hall.
You are greeted with a raised bridge and a ladder. Go down the ladder and around a corner to find an upgrade circuit. Now, look at the puzzle on the wall. Use Kinesis to turn the circles and get all of the end-points to match up with each other. Caution: you'll be attacked by multiple enemies after changing a few circuits, even before you're done with the puzzle. Once done, climb back up the ladder and cross the bridge to the other side. Ride the elevator down into a room with another ladder. Climb this one down, defeat some nasties and go through a few more rooms (and nasties) until you find a ladder to climb up (so many ladders...).
Go through the door and see a raised bridge. Use Kinesis on a blue circle to lower the bridge. Go to open the door, and find that there's... a power malfunction, of course! Kill off the wave of Necromorphs, then continue through the door. There's a bench in the new room, so use it if needed. Go through the next room, and take the cargo elevator down. Fight off the wave of Necromorphs, and continue into the next room. There is a text log here, as well as a few doors. The one straight ahead is a Torque Bar door. Use a torque bar if you have one, and go inside. There are twospare parts boxes, an upgrade circuit, and a weapon part in here. Nice haul. Now, back out to the main room.
The door across from the elevator ("Central Chamber") will take you to a corridor, followed by a room where you can deploy a scavenger bot. After doing that take the elevator down. The next room has a couple enemies, a place to deploy a scavenger bot, and a bench if needed (stock up, you will need it). Advancing into the next room, there is a text log and plenty of supplies. The next room is very blue. Call down the cargo elevator to trigger several, brutal waves of assorted Necromorphs. This battle is very hard. Use Statis extensively, as you'll face a number of super-fast Necros.
Once they are all dead, the storage crate will finish lowering. Inside arefour weapon parts and a spare parts box. Go through the only open door, and use the bench to unload all of your new goodies. Make your way towards the exit, after collecting the S.C.A.F. artifact at the far right end of the room (up the stairs, then right). Take the elevator up to the room near the start, and just when you think you were done, face another wave of fast and tough Necromorphs. When they're dead, you're done at last.