(1) This will be the last time you need to go 'round and 'round in the PILOT'S CHAMBERS! You will also finally get your look at the space jockey itself. Once again there is a powerup in the entrance chamber with you: grab the shotshell and move out. Kill the 2 chestbursters that mount an immediate assault on you, and then grab the shotshell in the corridor.
(2) Move clockwise and dispatch the 2 adult dog aliens and single chestburster in the next pair of alcoves; you will find a shotshell and flame thrower canister here, too.
(3) At alcoves 3 lie 1 chestburster, 2 adult dogs, 2 derm patches, and another flamer canister.
(4) Continue on to kill the chestburster and adult dog ahead; when you near the 'burster, a facehugger will appear behind you and attack. Directly ahead are another facehugger and chestburster that attack simultaneously. Having survived the onslaught, you will find a derm patch and acid boots in the left recess here.
(5) On your right will be the actual entrance to the pilot's room. Enter, but be prepared to kill any facehuggers or warriors activated by your approach. Move COUNTERCLOCKWISE, killing a total of 4 warriors and 4 facehuggers as you go. As you circle you will also find a shotshell, seismic charge, and med kit. Up on the space jockey's platform, you will get 2 med kits in addition to a really nifty view of the space jockey itself.
(6) Exit the pilot's room when you are done looking around and deal unflinching death to the revived 'huggers, 'bursters, and adult dog waiting outside. On the approach to alcoves 5 will be 2 adult dog aliens guarding a derm patch and med kit.
(7) Be careful of the significant presence at alcoves 6. Here you will have to eliminate 2 adult dogs, 2 warriors, a facehugger, and 2 chestbursters--smartgun time! For your trouble you get a derm patch, pulse rifle magazine, and shotshell.
(8) At the next paired alcoves are a warrior, 2 adult dogs, and a facehugger protecting 2 derm patches and a med kit.
(9) At alcoves 8 you will find body armor, 2 med kits, 2 flamer canisters, a pulse rifle magazine, and the exit chamber.
(10) Don't leave, though, because there are many more aliens to go! In order to get them all, you will have to make another full circuit of the level. There will be 1 new warrior and 1 new facehugger each at the entrance and at alcoves 2, and a single new warrior at alcoves 3. This will be in addition to all the revived enemies you will be dealing with as well. On your second trip around, be sure to re-enter the pilot's room to find a freshly-materialized smartgun magazine inside. As before, you will have a group of revived enemies awaiting your exit of this room.
(11) Now proceed forward and make your final, thankful exit from the PILOT'S CHAMBERS.