Fallout Wiki
Fallout Wiki

Data collection array... Online. Please use the terminal below to begin user synchronization.Stealth suit Mk II

Project X-13 is a side quest in the Fallout: New Vegas add-on Old World Blues.


This quest activates after acquiring the stealth suit Mk II during the quest X-13: Attack of the Infiltrator!. Completion of the basic infiltration test is a shared objective of both quests. Project X-13 gives the player character the option to further upgrade the suit after initialization.

Quick walkthrough[]

Side Quest: Project X-13 
Complete the Basic Infiltration test at the X-13 research facility.
Note: This is all you need to do to continue the main questline. You can return to Klein from this point forward. 
Reward: Firmware version 1.1 - Has a bonus of +10 to Sneak (Stacks with the +15 sneak already on the armor, giving +25 to sneak). 
Complete the Advanced Infiltration test. 
Reward: Firmware version 1.2 - Adds a bonus of +1 Perception. 
Complete the Expert Infiltration test. 
Reward: Firmware version 1.3 - Adds a bonus of +1 Agility. 
Complete the Robot Compliance test. 
Reward: Firmware version 1.4 - Adds a bonus of +20% to Stealth movement speed. 

Detailed walkthrough[]

After assembling the stealth suit Mk II during X-13: Attack of the Infiltrator! and entering the stealth testing lab, activate the test terminal to start the basic infiltration test. The Courier can freely explore the entire area prior to activating the actual test. If the Courier makes preparations by sweeping the area ahead of time, a search of the walls and desks will reveal many (currently inert) laser tripwire emitters which activate later in the optional tests. With a Science or Repair skill of 50, these can be permanently disabled or hacked (from a red laser beam to a blue, reading the player as friendly; no alarms will trigger when the blue beams are crossed). The currently friendly robots can also be destroyed ahead of time, which will not re-spawn until the final test.

Basic test: The test is initiated via a terminal on the bottom floor, next to a wall safe. Once the test is started, the player character must make their way through the area, avoiding any patrolling robobrains. If the player character is detected, the test will reset, and they must return to the test terminal to start again. Find the administrator's office and retrieve the X-13 document from the wall safe. Doing so will complete the basic infiltration test and shut down all security measures. A reward will appear in the safe next to the test terminal. There are several routes through the area on the lower floor to reach the safe. Alternatively, the test can be started, followed by a right turn from the test terminal, and a move upstairs to the observation level. Move to the area above the administrator's office and simply jump down to reach the safe next to the administrator's desk, thereby avoiding the security. The reward for doing this stage in Project X-13 redux are 10 energy cells.

Once the basic infiltration test is complete, the stealth suit Mk II will be upgraded (Sneak bonus increased by +10, to 25). Once complete, enemy robo-scorpions will appear throughout the X-13 facility under the direction of Dr. Mobius. Once the player has eliminated the newly spawned robo-scorpions, the next stealth test can optionally be run to further upgrade the stealth suit Mk II. The goal objective for the Advanced and Expert levels remains the same X-13 document located in the administrator's safe, and the player must deactivate the robobrains during the final robot compliance test. Security measures are increased with each test level.

Advanced test: Go back to the test terminal and start the advanced test. The Courier must again evade the robobrains (if not previously destroyed), but now also avoid the activated laser tripwires (if they were not disabled or hacked earlier). Completing the Advanced test will add a +1 Perception bonus to the suit's effects. Also, a new reward will appear in the safe next to the test terminal. The reward for doing this stage in Project X-13 redux are 10 microfusion cells.

Expert test: Go back to the test terminal and start the expert test. The security now consists of robobrains, laser tripwires, and additional proximity detectors that function similar to land mines albeit without the explosion. Unlike the first two hazards, the proximity detectors will not spawn until the player has started the expert test at least once, and will rearm themselves every time the Courier starts it regardless of whether or not they were disabled previously. However, no skill is required to deactivate them; simply walk up to them and use action button then choose "deactivate" and shut them off. The detectors have the appearance of pulse mines, but with rounded edges instead of jagged, and are usually placed on a table, desk, or floor to keep them out of sight. Completing the Expert test will add a +1 Agility bonus to the suit's effects. Again, a reward will appear in the safe next to the test terminal. The reward for doing this stage in Project X-13 redux is a copy of ¡La Fantoma! .

Robot compliance test: Go back to the test terminal a final time to start the robot compliance test. The security is the same as the expert test, but this time the robobrains along with the proximity detectors have respawned. This time the robots must be deactivated rather than simply avoided. If they were previously destroyed, they will respawn for this test. Sneak up behind each robot and use the option given to deactivate it. Once all robots are disabled the test immediately ends. Completing the robot compliance test increases the player's crouched movement speed by 20% when wearing the suit. A Chinese Army: Special Ops Training Manual will appear in the safe next to the test terminal as a final reward for completing all the challenges. The reward for doing this stage in Project X-13 redux is one Stealth Boy.

Quest stages[]

5 Return to the Experiment terminal.
10 Assemble the Experimental Stealth Suit.
20 Complete the Basic Infiltration Test.
25 Complete the Basic Infiltration Test Replay.
30 Complete the Advanced Infiltration Test.
35 Complete the Advanced Infiltration Test Replay.
40 Complete the Expert Infiltration Test.
45 Complete the Expert Infiltration Test Replay.
50 Complete the Robot Compliance Test.
55 Complete the Robot Compliance Test Replay.
100Quest finished[Optional] Complete all X-13 tests.


  • Until the test is initiated, the Robobrains and turrets will remain passive to the player, with the former even making remarks at the player.
  • After finishing a test the player can replay it repeatedly for unlimited rewards, including Stealth Boys or extra ammunition for energy weapons. The Chinese Army: Special Ops Training Manual reward given for the first completion of the Robot Compliance test is not repeatable; replays will give the same random rewards as the other tests.
  • All locked doors will always become locked again upon starting a new test, even if previously picked. In order to avoid exploits, only the first successful attempt at picking these locks will yield XP.
  • Replaying any test will add the side quest, "Project X-13 Redux" to the Pip-Boy quest screen. However, the quest will remain active with no way to complete it, even after completing all the tests again.
  • The robobrains and turrets can be destroyed by the player at any time, or by the robo-scorpions after completing the first test. The turrets will never respawn, and the robots will only respawn if the final test is activated, making the first three somewhat easier.
    • This will yield dismissive comments from the stealth suit Mk II, saying that those robots could have helped in defending the facility or that they were never allowed to do this before.
    • The robobrains can be intentionally re-spawned by the player as many times as desired in order to grind for challenges/achievements/trophies such as Blast Mastery.
  • The motion sensors won't be set off if the Courier has the Light Step perk.


  • Although the player is supposed to get a 20% movement speed bonus while sneaking once the final test is completed, the speed of the player is not actually increased.
  • PCPC While carrying out the Robot compliance test, the option to disable the robobrains might not appear when the player sneaks up to them. However the robots can still be disabled by pressing 'E' after which the option to disable them will appear. Xbox 360 users may press "A" to bring up the option dialogue.[verified]
  • PCPC If any of the robobrains are killed with energy weapons and disintegrated, the robot compliance quest cannot be completed. [verified] To fix this: (1) Select the quest in Pip-Boy. (2) Open the console. (3) Type "sqt". The IDs of the robobrains will be shown. (4) Type "prid THE_ID_OF_THE_ROBOBRAIN", then, "resurrect", then "disable", then "enable", and finally "moveto player". The Robobrain should now appear in your location. (5) Now you can go back to the terminal and redo the robot compliance part of the quest.


Main quests
Act 1Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!
Act 2Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer
Act 3No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Side quests
New California RepublicAnywhere I Wander · Back in Your Own Backyard · Bitter Springs Infirmary Blues · Boulder City Showdown · Can You Find it in Your Heart? · Climb Ev'ry Mountain · Don't Tread on the Bear! · Emergency Radio · Eye for an Eye · Flags of Our Foul-Ups · Hard Luck Blues · I Don't Hurt Anymore · I Put a Spell on You · Keep Your Eyes on the Prize · Medical Mystery · No, Not Much · Pressing Matters · Restoring Hope · Return to Sender · That Lucky Old Sun · The White Wash · There Stands the Grass · Three-Card Bounty · We Will All Go Together · You Can Depend on Me
Caesar's LegionBeware the Wrath of Caesar! · Caesar's Favor · Caesar's Foe · Caesar's Hire · Cold, Cold Heart · I Hear You Knocking · The Finger of Suspicion · We Are Legion
The StripBeyond the Beef · Bye Bye Love · Classic Inspiration · How Little We Know · Pheeble Will · Talent Pool · The House Has Gone Bust! · The Moon Comes Over the Tower
Freeside & Outer VegasBirds of a Feather · Bleed Me Dry · Debt Collector · G.I. Blues · High Times · Someone to Watch Over Me · The Coyotes · Wang Dang Atomic Tango
BoomersAnt Misbehavin' · Sunshine Boogie · Volare! · Young Hearts
Great KhansAba Daba Honeymoon · Cry Me a River · Don't Make a Beggar of Me · Oh My Papa
Powder GangBooted · I Fought the Law · Run Goodsprings Run · Why Can't We Be Friends?
Brotherhood of SteelEyesight to the Blind · Still in the Dark · Tend to Your Business
OtherCome Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune
Companion questsED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One for My Baby
Unmarked questsA Bit of Slap and Tickle · A Final Plan for Esteban · Access Powers · All Fired Up! · An Ear to the Ground · Andy and Charlie · Arachnophobia · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Don't Poke at the Bear! · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Most Wanted · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Powder to the People · Power to the People · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · Saving (or Savaging) Sergeant Teddy · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · The Star Showdown · Strategic Nuclear Moose · Straus Calls · Strip Search · Suits You, Sarah · Tags of Our Fallen · A Team of Moronic Mercenaries · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman
Add-on quests
Dead MoneySierra Madre Grand Opening! · Find Collars (8: "Dog", 12: Christine, 14: Dean Domino) · Fires in the Sky · Strike Up the Band · Mixed Signals · Trigger the Gala Event · Put the Beast Down · Last Luxuries · Curtain Call at the Tampico · Heist of the Centuries · Big Winner, Sierra Madre · Return to the FountainCut content
Honest HeartsA Family Affair · Arrival at Zion · Bighorners of the Eastern Virgin · Chaos in Zion · Civilized Man's Burden · Crush the White Legs · Deliverer of Sorrows  · Departing Paradise · Flight from Zion · Gathering Storms · Gone Fishin' · Happy Trails Expedition · Prisoners of War · Retake the Bridge · River Monsters · Rite of Passage · Roadside Attraction · Sanctity of the Dead · The Advance Scouts  · The Treacherous Road · The Grand Staircase · Tourist Trap
Old World BluesAll My Friends Have Off Switches · A Brain's Best Friend · Coming Out of Her Shell · Field Research · He Came... And Went · Influencing People · Midnight Science Fiction Feature! · Old World Blues · On the Same Wavelength · Picking Your Brains · Project X-13 · Sonic Emitter Upgrade · Welcome to the Big Empty · What's in a Name? · When Visitors Attack! · X-2: Strange Transmissions! · X-8 Data Retrieval Test · X-8: High School Horror! · X-13: Attack of the Infiltrator!
Lonesome RoadThe Reunion · The Silo · The Job · The Launch · The Tunnelers · The Divide · The Courier · The End · The Apocalypse