Quake II/Security Complex

Level objective
The objective for this level is to locate the Red Key and find a way to deactivate the yellow laser barrier.

From this level you can reach the ../Torture Chambers/, ../Guard House/ and ../Grid Control/.

First visit
Proceed south, straight ahead across the open space and enter the open door at the top of the stairs, go down a couple of flights of stairs, turning right, and eliminate the enemies you find there. Pay particular attention to any Medics you may see on the catwalk above, to keep them from reviving the Gunners. You can't reach the catwalk yet; it's only accessible from the Torture Chambers. Go up the stairs at the left side of the room and stay along the east wall on the mezzanine, then enter the passageway in the northwest corner. Follow the passageway to encounter a Gladiator guarding the Red Key in a control room area. Also find a Chaingun there. Return to the previous room and explore downstairs. You'll find a couple of Quad Damage items and additional items under the stairs. Explore outside to see the Pyramid. You can't enter yet, as you lack the Pyramid Key. Go back up the stairs and into the open area where you arrived from the Detention Center.

Explore the tunnel down the stairs to the west In the tunnel you'll encounter a Tank guarding a control secured with a yellow laser barrier. The Tank can be eliminated by staying at the opposite end of the tunnel, in the right-angle turn, and, while staying under cover, firing blindly with the Blaster. If you do it correctly, the Tank will never see you, so he'll stay at his post and take hits until he collapses. You can explore further along the passage, but you'll find your path blocked by a retracted bridge over a pool of lava. The bridge control is evidently in the alcove behind the laser barrier.

Going into the building on the east, you'll encounter several enemies, but eventually your progress will be blocked by a yellow laser barrier across a portal. The only secret in the Security Complex is to be found just to the right of the laser barrier.

Return to the Detention Center with the Red Key to complete that area.

Second visit
On the second visit to the Security Complex area, the yellow laser barriers should be shut off, giving you more access. You can now reach the Guard House area entrance by entering the door to the east or the Torture Chambers area entrance by descending the stairs into the tunnel to the west.

It is recommended that you now proceed to the ../Torture Chambers/ area. If, however, you choose to explore past the now-inactive yellow laser barrier up to the entrance of the Guard House area, you will encounter another crashed drop-pod with the body of a Marine lying next to it. The pod is inscribed "Willits". Too bad your buddy didn't make it. Collect his Power Shield and Chain Gun and put it to good use. The mezzanine on the north and west sides of this area isn't accessible except by way of the Torture Chambers area.

Third visit
Returning from the Torture Chambers area, proceed to the ../Guard House/ area to retrieve the Pyramid Key.

Fourth visit
Returning from the Guard House area, you should now have the Pyramid Key and the Data CD. Proceed to the Pyramid at ground level on the south side of the central building in the Security Complex area. Open the Pyramid, destroy the Icarus that appears (the final kill for the Security Complex area), and ride the lift platform down the shaft revealed at its center. At the lower level you'll find a HyperBlaster and health items. Go through the door to the south and step onto the lift that takes you to the ../Grid Control/ area.

Secrets
This level has one (1) secret:
 * In the room just before emerging into the open space with the door that leads to the Guard House, shoot the west wall to open a hidden panel and reveal a Grenade Launcher. It is just to the right of the portal secured by the yellow laser barrier.