Wreck of the Maria Doria - Rooms Behind the Ballroom - Rusty Key
NOTE: I want you to be able to see what's going on, so I tend to increase the brightness and use more flares than you'll probably need. For tips on conserving flares, see the note in the main walkthrough.
After obtaining the FIRST CIRCUIT BREAKER on the BALLROOM balcony, as shown in the last section, proceed through the high door at the far end of the room.
Follow the blue hallway to the rusty passageway beyond. Here there are 5 doors: a door with a lock on the right opposite a hatch with a wheel on the left; then another hatch with a wheel on the right opposite a sealed door on the left; and at the far end of the corridor, another sealed door. The room behind the first wheeled hatch is empty, and you don't have a key for the locked door yet.
Use the wheel to open the second door on the right.
Drop down into a metal room...
...containing 2 movable blocks, a switch, and a high door.
Pull the lower block twice.
Climb over it to the opposite side and push it once.
Go around to the side and pull it once.
Then climb over it once more and push the block under the switch.
Climb up and use the switch to open the door above. Pull the second block out onto the ledge...
...and use it to reach the door.
Drop into the passageway ahead and follow it around a corner...
...through a small room with a closed door on the left, and up a ramp.
At the top, a guy with a wrench (11) tries to stop you. Kill him and enter the room he came from.
Slide the movable block under the switch...
...and pick up the RUSTY KEY (13) that the block had been hiding.
Climb onto the block and throw the switch to open the exit. Go through the door you just opened to emerge back at the end of the HALLWAY WITH FIVE DOORS. Head to the right...
...and use the RUSTY KEY in the lock to open the door next to it.
Drop into another metal room with movable blocks.
Move the block in the corner to the end of the ledge.
Climb onto the ledge and pull the second block out from the wall twice...
...so you can enter the area behind it. Push the third block you find there to open up a passageway.
Follow it to the end and hop down into the next room.
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