Old World Blues Unlockable Perks
Brainless [Doctor Klein]: Congratulations, your brain has been removed. Your head can no longer be crippled; you've got a bonus of 25 percent to resisting chem addiction, and a 5 percent bonus to your Damage Threshold.
Heartless [Doctor Klein]: You no longer have a heart. You can no longer be poisoned, healing items are boosted by 25 percent, and robots are confused by you lowering their ability to ring your bell with a critical hit by 50 percent.
Spineless [Doctor Klein]: Yes, your spine has been removed too this time. Your Strength has been increased by 1, Damage Threshold is also raised by 1, and your torso can no longer be crippled.
Big Brained [Sink Auto-Doc, DLC Completion]: You have your brain back and it has improved while it was away. Your head still can't be crippled, but your resistance to chems has been lowered by 10 percent from the previous state. Your Damage Threshold is now increased by 10 percent though.
Cardiac Arrest [Sink Auto-Doc, DLC Completion]: With your heart back in your body you are now only 50 percent resistant to poison and robots will be only 25 percent less likely to gain a critical hit, but healing items now are 50 percent more effective than normal.
Reinforced Spine [Sink Auto-Doc, DLC Completion]: Your spine is back and better than ever. Your torso can be crippled now, but the bonuses to your Strength and Damage Threshold are now doubled, adding 2 points to each instead of 1.
Implant C-13 [Sink Auto-Doc, 8,000 Caps]: This implant will give you a 10 percent damage boost to cazadores.
Implant M-5 [Sink Auto-Doc, 10,000 Caps]: This implant will increase your movement speed when you are crouched by 20 percent.
Implant Y-3 [Sink Auto-Doc, 12,000 Caps]: This implant can eliminate the radiation from small water sources. It will help you with Dirty Water, but not if your drinking from a toilet.
Implant Y-7 [Sink Auto-Doc, 20,000 Caps]: This implant will allow you to gain additional health and Action Points when eating food. The end result is a 5 HP bonus and a 2 AP bonus.
DNAgent [X-8 Data Retrieval Test Quest]: After completing the required quest you will now do an additional 10 percent damage to Nightstalkers.
DNAvenger [3 Ranks]: You must kill several cazadores in the Big Mountain Research and Development Center area for this perk. Each rank of this perk adds an additional 10 percent damage to cazadores. You must kill 2 cazadores, then 3 cazadores, and then 5 cazadores to reach the highest rank.