⇨ Collect the crafting items for the power switch.
⇨ Find the book to craft.
⇨ Find the propane torch (3 possible locations) to light the wall torches.
⇨ Find the gas and diesel cans to craft the generators.
⇨ Power on the two spotlights.
⇨ Find the license plate (2 possible locations) to enter the elevator passcode.
⇨ Find the first keycard to craft.
⇨ Find the second keycard to craft.
⇨ Find the third keycard to craft.
⇨ Fine the cube (3 possible locations).
⇨ Find the fourth keycard to craft.
⇨ Place the cube.
⇨ Take the teleporter and shoot the 8 orbs.
⇨ Launch the missiles.
⇨ Activate the elevator power switch.
⇨ Escape in the elevator.