Get to the FTL ship and stop it from launching (part 2) | Mission 10: Derelict Reclaimed A: CM Guide
Last update: 11 May 2016
Backtrack to the elevator you went past earlier. Stand on it and interact with the control panel to have it take you up. Make your way towards the above passage and start exploring the corridors.
Watch out for Lurkers, they're here as well. Stop each time you hear something that may suggest their presence, so that you'd have a free moment locating and getting rid of them. Make sure to destroy each and every one egg you stumble upon so that you won't have to waste ammo (and lose armor points) trying to kill Facehuggers.
Continue onward, past the ancient Space Jockey. When you get to the gallery, it's wiser to slow down. There are not only Lurkers to take care of, but also a crate with the above Dog Tag (PFC J. Ma).
Move forward. Before leaving this place, check out the area on the right, but destroy the eggs first. You should find a full set of armor there. Make your way to the near corridor, you have a free way. A few moments later you'll reach the passage, pictured above, that leads to the surface. Listen to new orders which will tell you to destroy the first of three AA guns in the area.