Wraith, 4x Cacodemon

Navigate the deeper levels of Mars in Doom 3, battling Wraiths, Arch-viles, and Cacodemons. Find keycards and discover the 'Tablets' PDA.

Alright, you're heading deeper into Mars now. When you first step out of the lift, get ready – an Arch-vile is gonna pop out. Take it down, and snag any loot it leaves behind. You'll see a couple of doors, but one needs an access card, so that's your obvious next move.

Keep following the path, and you'll run into three Wraiths. Deal with them, grab the goodies in the next room, and push on. Another Arch-vile will show up in the next area, along with a keycard you'll need. Grab it!

Now, head back to that very first room. On your way, you'll have to fight an Imp and another Wraith. Once you're back in the initial room, a swarm of Trites will appear. Clear them out, then use that keycard to get into the Storage Room. Grab everything inside, and then just hang tight for a minute. After about sixty seconds, more Trites will show up, along with a Cacodemon. Take them both out.

After that, go back to where you found the keycard. You can grab some extra goodies on the platforms there by doing some jumping. If you decide to use the panel to restore power, be warned: two Hellknights and three Cacodemons will be summoned. Once they're dealt with, head into the building.

Inside, use the panel to get the lights back on. As you move further down the hall, a few Trites will pop out, so deal with them. Keep going, and you'll reach a room filled with strange artifacts. You'll need to fight some Imps and Wraiths here. After the fight, look for the final Video Disk on a desk – it's called 'Tablets' and talks about research archives.

• PDA UPDATE:
• Video Disk
• Title: Tablets
• Creator: Central Authority
• Date: 10/05/45
• Description: Central Authority Research Archive
• Shown: Information about the tablets you saw in Site 3.

Continue down the path. You'll enter another room where a Hellknight, an Imp, and some Trites will appear. Once they're all down, follow the path again. You'll arrive in a room with weird, spiky objects that look a lot like the Vagary. And yep, you guessed it – you'll be fighting Vagaries and Trites in here. Keep your distance and try to use the BFG or Rocket Launcher if you have them. Grab any remaining loot, then open the door with the light.

Grab the goodies in the next area, turn on the power, and get ready for the final stretch. Use the lift to proceed.