Fallout 2 Walkthrough → Perks (Levels 15-24)
Melee Attack Bonus - You're either familiar with the secret martial arts of the East, or you simply strike more often. Either way, your melee attacks cost 1 less AP.
Requirements: Level 15, Dexterity 6. Levels: 1.
Rate of Fire Bonus - You now pull the trigger slightly faster while remaining accurate. Attack time is reduced by 1 Movement Point.
Requirements: Level 15, Dexterity 7, Intelligence 6, Perception 6. Levels: 1.
Pickpocket - You are more skilled at thievery than the average pickpocket. This means that the side you're on and the size of the item you're stealing no longer matter.
Requirements: Level 15, Dexterity 8, Steal 80%. Levels: 1.
The Butcher — the Butcher is on the hunt! Your vicious fists and kicks will always deal critical damage to your opponent, sowing destruction and chaos in your path. In melee combat, critical strike chance is calculated using a new formula: (UD/10) x 100%. Critical Chance is no longer taken into account.
Requirements: Level 24, Dexterity 8, Strength 8, Unarmed 80%. Levels: 1.
Sniper - You have mastered the art of firearms. With this bonus, upon successful Luck check, every accurate hit will be considered a critical hit for your opponent.
Requirements: Level 24, Dexterity 8, Strength 8, Unarmed 80%. Levels: 1.
Silent Death - If you sneak up on an enemy and strike them in the back with a punch or kick, you'll deal double damage. That's the terrifying bonus, Silent Death.
Requirements: Level 18, Dexterity 10, Stealth 80%, Unarmed 80%. Levels: 1.
Perks: ( level 3 ) ( level 6 ) ( level 9 ) ( level 12 ) (levels 15-24)
Source: ru.fallout.wikia.com.