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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. With 10 Luck and the Ninja perk (15% base increase), Stabhappy will critical-strike 100%. 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 Operation: Anchorage (add-on)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 Operation: Anchorage (add-on)Gametitle-FO3 OA - A sim-only version of the weapon which differs only in health (essentially non-degrading).
  • Sim version trench knife Operation: Anchorage (add-on)Gametitle-FO3 OA - A sim-only version of the weapon which differs only in health (essentially non-degrading).


Weapon name (current weapon is highlighted)Icon meleeDamage per attack (damage per projectile)Icon damageDamage per secondIcon dpsAttacks per secondIcon attackCritical Chance % multiplierIcon chanceCritical damageIcon critical damageAction Point costIcon actionDamage per action pointIcon dapDurability (number of attacks before breaking)Icon repairWeightIcon weightValue in capsIcon merchantValue to weight ratioIcon ratio
Combat knife 7
Occam's Razor 10
Stabhappy 10
Trench knife fo3oaGametitle-FO3 OA7
Note: Melee damage is doubled in V.A.T.S.



  • ps3Icon ps3 xbox360Icon 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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