Doom 3 Walkthrough Alpha Labs Sector 2

September 12, 2016 (Last Updated: ) | Reading Time: 6 minutes

This Doom 3 walkthrough is divided into 27 total pages.

You can jump to nearby pages of the game using the links above.

Alpha Labs Sector 2

Doom 3 Walkthrough - Doom 3 262
Doom 3 Walkthrough - Doom 3 262

Advance up the stairs and these two Imps spawn.

Doom 3 Walkthrough - Doom 3 263
Doom 3 Walkthrough - Doom 3 263

Don't miss this armor and ammo around the right corner before exiting out the door.

Doom 3 Walkthrough - Doom 3 264
Doom 3 Walkthrough - Doom 3 264

This Imp spawns in the doorway behind you.

Doom 3 Walkthrough - Doom 3 265
Doom 3 Walkthrough - Doom 3 265

The door on the left opens just enough for this Z-Sector to shoot at you.

Doom 3 Walkthrough - Doom 3 266
Doom 3 Walkthrough - Doom 3 266

Enter the restroom to do battle with three zombies and a maggot.

Doom 3 Walkthrough - Doom 3 267
Doom 3 Walkthrough - Doom 3 267

You'll find grenades in the handicapped stall, plus this medkit seen here. Climb the ladder on the right.

Doom 3 Walkthrough - Doom 3 268
Doom 3 Walkthrough - Doom 3 268

A radio transmission is heard from someone trapped in storage room C4. Sadly, that's the last you hear from him. Ready your shotgun and stay right as you crawl through the shaft. As you approach this cache of health and armor a maggot attacks. A weapons clip is to the right. Update: Herman from the Netherlands sends note that there are more signs of the trapped man later on.

Doom 3 Walkthrough - Doom 3 269
Doom 3 Walkthrough - Doom 3 269

Follow the other branch of the shaft and witness this zombie feeding.

Doom 3 Walkthrough - Doom 3 270
Doom 3 Walkthrough - Doom 3 270

Drop below and battle two Imps and this maggot.

Doom 3 Walkthrough - Doom 3 271
Doom 3 Walkthrough - Doom 3 271

Enter the security checkpoint on the right to find the feeding zombie you witnessed earlier. Both zombies arise and attack. Note the health station in the back.

Doom 3 Walkthrough - Doom 3 272
Doom 3 Walkthrough - Doom 3 272

On the left counter is the PDA for Andrew Chin, revealing the code for storage cabinet 038 to be 409. Also here is this security scanner, where you can see that someone is in engineering coolant control. Select "security checkpoint" to view yourself.

Doom 3 Walkthrough - Doom 3 273
Doom 3 Walkthrough - Doom 3 273

Return to the hallway. Grab the armor seen under the floor before passing through the door on the right, then through another door.

Doom 3 Walkthrough - Doom 3 274
Doom 3 Walkthrough - Doom 3 274

Pop a maggot with your shotgun and an Imp spawns behind him.

Doom 3 Walkthrough - Doom 3 275
Doom 3 Walkthrough - Doom 3 275

The corridor depressurizes, but you still have time for a quick view of the Martian landscape.

Doom 3 Walkthrough - Doom 3 276
Doom 3 Walkthrough - Doom 3 276

Pass through two more doors and show your shotgun to this Z-Sector. Watch the UAC video to learn about the MFS Compressor.

Doom 3 Walkthrough - Doom 3 277
Doom 3 Walkthrough - Doom 3 277

Press on and spot your fellow Marines through this window.

Doom 3 Walkthrough - Doom 3 278
Doom 3 Walkthrough - Doom 3 278

Defeat this maggot and two Z-Sectors attack.

Doom 3 Walkthrough - Doom 3 279
Doom 3 Walkthrough - Doom 3 279

On this left counter is the MFS Compressor video and Walter Connors' PDA, revealing the code 102 for storage cabinet 039. Before heading through that door ahead...

Doom 3 Walkthrough - Doom 3 280
Doom 3 Walkthrough - Doom 3 280

...hop across the compressor to storage cabinet 038. Unlock it with code 409 to find a clip, grenades and armor.

Doom 3 Walkthrough - Doom 3 281
Doom 3 Walkthrough - Doom 3 281

Press on to battle two Z-Sectors and an Imp -- they're far enough away that grenades are a safe choice. Just when you think you're done, this maggot crawls out from the left wall -- switch to the shotgun. Note the medkit on the left. In the crawlspace behind the maggot is an ammo belt and a clip.

Doom 3 Walkthrough - Doom 3 282
Doom 3 Walkthrough - Doom 3 282

This medkit is tucked around the right corner. A clip and another medkit are available along the left wall. Herman from the Netherlands writes that if you walk a bit left of this frame, you can find evidence of the trapped man noted earlier: "You'll find a floor panel which is damaged, it looks like someone was scratching there. If you'd shoot that panel, it will fall down and reveal a ladder to a room with an imp, 2 clips (60 bullets a piece) and some shells. After you shoot the barrels beside the ammo, you can find security armor and another clip. When entering the room you'll hear another radio transmission, too."

Doom 3 Walkthrough - Doom 3 283
Doom 3 Walkthrough - Doom 3 283

Ready your shotgun and ride this lift down.

Doom 3 Walkthrough - Doom 3 284
Doom 3 Walkthrough - Doom 3 284

Defeat this Imp/maggot tag team.

Doom 3 Walkthrough - Doom 3 285
Doom 3 Walkthrough - Doom 3 285

Grab a medkit and armor on the left before continuing through this door, where you'll find a clip to the right.

Doom 3 Walkthrough - Doom 3 286
Doom 3 Walkthrough - Doom 3 286

It's the guy you saw on the security scanner. He offers to lead you out of here if you protect him. Time for an escort mission!

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Doom 3 Walkthrough - Doom 3 287

You'll have a couple false starts before this first attack. The power goes out, then you hear a loud clank, and then this Imp attacks.

Doom 3 Walkthrough - Doom 3 288
Doom 3 Walkthrough - Doom 3 288

Don't be in a panic to keep up with Edwards. He'll wait and you'll find goodies like this clip, shells, and medkit in the left corner before he descends the stairs.

Doom 3 Walkthrough - Doom 3 289
Doom 3 Walkthrough - Doom 3 289

Just after the stairs, Edwards turns left here. You turn right and take out an Imp in the corner. A bag with grenades, a clip, shells and bullets is back there as well.

Doom 3 Walkthrough - Doom 3 290
Doom 3 Walkthrough - Doom 3 290

The power goes out again. Edwards turns left; this Imp attacks from the right.

Doom 3 Walkthrough - Doom 3 291
Doom 3 Walkthrough - Doom 3 291

The glowing eyes reveal your next foe to be a maggot. Note the medkit, clip and shells on the right. Edwards spots the exit. Poor Edwards.

Doom 3 Walkthrough - Doom 3 292
Doom 3 Walkthrough - Doom 3 292

As your near that ladder, the lights fail and this Imp leaps out of the darkness. Edwards doesn't make it.

Doom 3 Walkthrough - Doom 3 293
Doom 3 Walkthrough - Doom 3 293

Another Imp has spawned behind you. Defeat both Imps then climb the ladder.

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Doom 3 Walkthrough - Doom 3 294

Before charging through the door at the top of the ladder, look back to find locker 039. Open it with code 102 to find armor and ammo.

Doom 3 Walkthrough - Doom 3 295
Doom 3 Walkthrough - Doom 3 295

Hop across these pipes to the walkway on the other side.

Doom 3 Walkthrough - Doom 3 296
Doom 3 Walkthrough - Doom 3 296

Crouch through this crawlspace. Crawl through spider webs, see spidery shadows and hear a strange clicking sound.

Doom 3 Walkthrough - Doom 3 297
Doom 3 Walkthrough - Doom 3 297

Meet your next new foe - the Trite. Pop his juices with a few rounds from your machine gun.

Doom 3 Walkthrough - Doom 3 298
Doom 3 Walkthrough - Doom 3 298

You're safe for the moment. Heal at this health station and grab armor and ammo here.

Doom 3 Walkthrough - Doom 3 299
Doom 3 Walkthrough - Doom 3 299

Ready your machine gun and activate this panel.

Doom 3 Walkthrough - Doom 3 300
Doom 3 Walkthrough - Doom 3 300

The service ladder doesn't extend right away, and a swarm of Trites attacks. Use short bursts on your machine gun. It only takes a few bullets to pop a Trite.

Doom 3 Walkthrough - Doom 3 301
Doom 3 Walkthrough - Doom 3 301

Climb the ladder once it finally extends. Another wave of Trites attacks, but you don't have to battle them. Head into the elevator on the left and the Trites won't follow. Activate the panel on the left to end the level and proceed to Alpha Labs Sector 3.

More Doom 3 Walkthroughs

This Doom 3 walkthrough is divided into 27 total pages.

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