Ninja

Ninja is a perk in Fallout 3, Fallout: New Vegas and Fallout 4.

Effects
When attacking, you gain a +15% critical chance on all Melee and Unarmed attacks. Also, Sneak attack criticals do 25% more damage than normal.

Bugs

 * In Fallout 3, the extra 15% critical chance does not work without the help of the unofficial Fallout 3 patch.
 * In Fallout: New Vegas Ninja multiplies your critical chance by 1.15 instead of adding a flat 15%, unlike all other perks/traits that modify critical chance. For example, a character with a critical hit chance of even 25% would have it be increased to only 28.5% rather than to 40% as it should. (25% * 1.15 = 28.75% vs 25% + 15% = 40%)
 * The bonus to the actual sneak attack damage multiplier on silenced weapons provided by this perk is known to behave erratically when interacting with Cloak & Dagger and Mister Sandman. There does seem to be a bug with the calculations with all three perks active, depending on the order in which they were granted, as follows:

Sandman 3, Cloak, Ninja 3 = 6.3x Sandman 3, Ninja 1, Cloak, Ninja 3 = 5.9x Sandman 3, Ninja 2, Cloak, Ninja 3 = 5.9x Sandman 3, Ninja 3, Cloak = 5.9x Ninja 3, Cloak, Sandman 3 = 6.3x Ninja 3, Sandman 3, Cloak = 6.3x Cloak, Sandman 3, Ninja 3 = 6.3x Cloak, Ninja 3, Sandman 3 = 5.4x (!)

Further testing needed, but right now the only solution appears to be selecting/receiving these perks in the "correct" order.


 * Fallout 4, The level 2 Ninja perk works strangely with different weapon types. For instance, different from skill description, it deals *4 sneak attack damage with Baseball bat , Sledgehammer and Super sledge. It works porperly and deals *5 sneak attack damage with Combat knife, Chinese officer sword and Tire iron.

"Works strangely" may be attributed to the sneak attack multipliers also accounting for the weapon wielded and associated critical damage perks.

Given the following Perks: Mr. Sandman Rank 1 = 15% Sneak Damage, Cloak and Dagger = 20% Sneak Damage, Guns and Bullets Rank 1 = 5% Critical Damage, Tesla Science Rank 2 = 10% Critical Damage,

Suppressed Ballistic: Sneak Attack Multiplier = 2.0 * 1.15 * 1.20 * 1.05 = 2.89

Energy Weapon: Sneak Attack Multiplier = 2.0 * 1.20 * 1.1 = 2.64

The displayed multiplier drops the last character and does no rounding. The calculated multiplier is what's used to calculate your damage.

The Better Criticals perk IS NOT applied in the multiplier but applies to the resulting damage following the Sneak Attack calculations.

Ninja Ниндзя Ninja