Perks in The Outer Worlds are benefits that both players and companions can acquire to further increase a Skill or to gain various buffs. Players obtain one perk point for every 2 levels gained, not only that but through gameplay, such as completing Quests or accepting a Flaw allows a player to gain perk points. This page contains a full list of all the skills in the game.
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How do Perks work?
Players and Companions obtain perk points which they can spend to unlock a perk. Players will have the complete freedom to choose whichever desired perk they want to unlock as well as for the companions that best suit their playstyle or to better improve and specialize in certain skills. For the players, there is a total number of 42 perks within three tiers, while companions have their own set of perks. There is no limit to acquiring or equipping Perks, and as mentioned, you can unlock as many as you want and choose whichever perk you want. Finally, in order to unlock the next perk tier, players will have to unlock a certain number of perks. For example, players will need to unlock 5 perks from Tier 1 in order to unlock the perks listed in Tier 2.
Can players respec their points?
Yes, they can. At first, it costs 500 Bit Cartridges to respec a player's Perk Points and the amount doubles and further increases each time you decide to respec your points.
The Outer Worlds Perks
Tier 1

Strider
+25% Walk Speed

The Negotiator
-20% Vendor Prices

Pack Mule
+50kg Carrying Capacity

A Few Bits More
+100% Additional Ammo stock on Vendors
+100% Additional Consumable and General stock on Vendors

Resilient
+5 Base Armor Rating

Applied Science
(Only available with Peril On Gorgonn DLC)
+25% Science Weapon Magazine Size

Nietzsche's Reward
(Only available with Peril On Gorgonn DLC)
+5% Damage per Flaw
Tier 2
Requires 5 previous perks to unlock Tier 2

Speed Demon
+25% Movement Speed during Tactical Time Dilation

We Band of Brothers
+25% Chance to reset a Companion Ability cooldown on each Critical Hit

Hoarder
-50% Consumable Weight

Soliloquy
+10 Dialog Skills

Assassin
(Only available with Peril On Gorgonn DLC)
+25% Quiet Weapon Damage

Lone Master
(Only available with Peril On Gorgonn DLC)
All Skills +5, if no Companions in party
All Skills +10, if no Companions recruited
Tier 3
Requires 10 previous perks to unlock Tier 3

Armor Master
+100% Skill Bonus
+10% Armor Rating Bonus

Last Stand
+30% Damage while under 25% Health

Thick Skin
-15% Plasma Damage Received
-15% Area of Effect Damage Received

Solo Sneaker
-33% Detection Radius of Enemies

Improvisation Warrior
(Only available with Peril On Gorgonn DLC)
+300% Improvised Weapon Damage
+75% Improvised Weapon Degradation

Concentrate Fire
(Only available with Peril On Gorgonn DLC)
A 10% Damage per subsequent hit
Tier 1
Tier 2
Requires 1 previous perk to unlock Tier 2
Tier 3
Requires 2 previous perks to unlock Tier 3
Tier 4
Requires 3 previous perks to unlock Tier 4
Tier 5
Requires 4 previous perks to unlock Tier 5
Unique Companion Perks
Parvati Unique Perks

Synchronicity (Tier 3)
+25% Tactical Time Dilation Meter

Rust Bucket Resistance (Tier 4)
(Only available with Peril on Gorgon DLC)
-20% Automechanical Damage Received

Chrono-Harmony (Tier 5)
(Only available with Peril on Gorgon DLC)
+25% Tactical Time Dilation Meter
Vicar Max Unique Perks

Bonus Support Hack (Tier 1)
+10 Hack

Mad Max (Tier 3)
+20% Science Weapon Damage

Grand Justice (Tier 4)
(Only available with Peril on Gorgon DLC)
Trickshot ignores 50% Armor Rating

Planned Intervention (Tier 5)
(Only available with Peril on Gorgon DLC)
Max will taunt enemies within +20m when you drop below 25% Health
Felix Unique Perks

Rebellion (Tier 3)
+20 Damage to Corporate Military

This.Is.Tossball! (Tier 4)
(Only available with Peril on Gorgon DLC)
+50% Tossball Weapon Damage
SAM Unique Perks

Bad Samaritan (Tier 3)
+20 Damage to Automechanicals

Radiation Proofing (Tier 4)
(Only available with Peril on Gorgon DLC)
-20% N-ray Damage Received

Bedazzle Automechanicals (Tier 5)
(Only available with Peril on Gorgon DLC)
Stun: Stuns the target, leaving them unable to act for a short time
Nyoka Unique Perks

Exterminator (Tier 3)
+20 Damage to Creatures

Grand Exploration (Tier 4)
(Only available with Peril on Gorgon DLC)
+100% Location Discovery Experience

Cunning Strikes (Tier 5)
(Only available with Peril on Gorgon DLC)
+20% Sneak Attack Damage
Ellie Unique Perks

Bonus Support Medical (Tier 1)
+10 Medical

First Responder (Tier 2)
+20% Heal amount granted by Medical Inhaler.

CPR (Tier 3)
Recover 25% Health when fatally wounded.
Cooldown: 5 min

Emergency Med Tech (Tier 4)
(Only available with Peril on Gorgon DLC)
+50% Healing from Inhaler when under 20% Health

Magic Bullets (Tier 5)
(Only available with Peril on Gorgon DLC)
Shots from Ellie's Ability ricochet to a second, nearby enemy.