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Dog Run is a three-part challenge in the Fallout: New Vegas add-on Old World Blues.

Challenge requirements

The Courier must:

  1. Complete the X-8 Basic Testing Program in the X-8 research center.
  2. Complete the X-8 Advanced Testing Program.
  3. Complete the X-8 Testing Program...with Nightstalkers!


  • Grants 100 XP upon completion of a challenge part.
  • Unlocks the perk DNAgent.


  • Completing the Basic Testing Program challenge will unlock the Advanced Testing Program challenge, which in its turn will unlock the Testing Program...with Nightstalkers! challenge.
  • The Nightstalker Testing Program must be unlocked by gaining access to the kennel in the X-13 research facility beforehand.

Behind the scenes

Dog Run II: Who let the... is a reference to Baha Men's song "Who Let the Dogs Out".