Luck functions in the same manner as Fallout 3. It raises the value of every skill +1 for every 2 points in Luck (see chart below Level names and statistics) and affects Critical Chance. It also improves the odds of winning at any casino game; the higher the Luck, the more likely favorable outcomes on bets will be. If having won a casino bet through the influence of Luck, the "You feel lucky" message is displayed. A Luck of 6 will begin to influence Roulette and Slot machines, though rarely. A Luck of 7 is required to win with any regularity or to begin to influence Blackjack outcomes.
7 Luck to correctly guess the code phrase to prevent the mobile facial recognition scanner at REPCONN headquarters from attacking.
9 Luck to successfully complete the operation to remove the brain tumor that's killing Caesar during Et Tumor, Brute? (bypasses Medicine and Auto-Doc requirement; 8 or less Luck will result in Caesar's death).
Ways to increase Luck[]
Permanent
Luck Implant available at the New Vegas medical clinic (+1)
Early Bird (+2 between 6am and 12pm, but -1 between 6pm and 6am)
Notes[]
When playing at casinos, a Luck of at least 7 is required to get favorable odds. Blackjack is the most affected by Luck; at 10, it will produce fairly constant patterns in what cards are dealt to based on the current total. Slots will turn out losses on most spins, but at higher Luck will produce an occasional jackpot. Roulette, like Slots, will produce a loss on most spins and requires prudent betting to gain much benefit from Luck.
Doc Mitchell will have a unique comment if the Courier's Luck attribute level is the most extreme (highest or lowest) during character creation, as follows:
Doc Mitchell's remark about the bullets "climbing back into the gun" with extreme-low Luck is a nod to the combat systems in Fallout 1 and Fallout 2, where attacks had the capability to backfire and inflict negative consequences on the player character, including destroying their own weapon.
Extreme
Comment
Low
"Now that don't make a lick of sense. Seems to me you're the luckiest son-of-a-gun in New Vegas."
Completing the quest The Apocalypse or The End will allow raising any one primary statistic by 1.
"Blackjack" variant of the Courier duster (+1)
