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For an overview of combat knifes in all games, see Combat knife.

Stabhappy is a unique combat knife in Fallout 3.


With its low AP requirement of 17, a player with high Agility can deliver a good deal of damage with only a single round of V.A.T.S. By combining Luck, Finesse and the Ninja perk in various ways, Stabhappy will critical strike 100% of the time. The weapon also damages limbs at a slightly increased rate.


  • Combat knife - The standard variant.
  • Occam's Razor - A slightly stronger version of the regular combat knife, though it is less effective than Stabhappy. It is wielded by Talon Commander Jabsco.
  • Trench knife Gametitle-FO3 OA - The trench knife's stats are identical to the regular combat knife. The only difference is a unique "knuckle-duster" skin.
  • Sim version combat knife Gametitle-FO3 OA - A sim-only version of the weapon which differs only in health (essentially non-degrading).
  • Sim version trench knife Gametitle-FO3 OA - A sim-only version of the weapon which differs only in health (essentially non-degrading).


Icon melee- Weapon name (melee or unarmed)Icon sequence- Attacks in V.A.T.S.
Icon gun- Weapon name (gun, energy or explosive)Icon action- Action point cost
Icon damage- Damage per attack (damage per projectile)Icon dap- Damage per action point
Icon dps- Damage per secondIcon spread- Weapon spread
Icon explosion- Area of effect damageAssault carbine extended magazines- Magazine capacity (shots per reload)
Icon effect- Effect damage & durationIcon repair- Durability (number of attacks before breaking)
Icon bonus effect- Bonus effectsIcon weight- Weight
Icon attack- Attacks per secondIcon merchant- Value in caps
Icon chance- Critical chance % multiplierIcon ratio- Value to weight ratio
Icon critical damage- Critical damageIcon ability- Skill required
Icon crit effect- Critical effect damage & durationIcon fist- Strength required
Icon plus- With all mods attached
Icon meleeIcon damageIcon dpsIcon attackIcon chanceIcon critical damageIcon actionIcon dapIcon repairIcon weightIcon merchantIcon ratio
Combat knife 7
Occam's Razor 10
Stabhappy 10
Trench knife Gametitle-FO3 OA7
Note: Melee damage is doubled in V.A.T.S.



Playstation 3Icon ps3 Xbox 360Icon xbox360 The raiders inside and outside the shack (including the one which carries the Stabhappy) respawn every 72 hours, allowing the player an unlimited supply of Stabhappy's. This is not so much a bug, but more of an re-spawning flag oversight by a programmer. The game functions properly, though possibly not as the programmer intended. [verified]

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