Each Melee kill grants 5% Melee Damage, 5% Melee Speed and 5% Move Speed for 3 seconds.

Pain Meds you apply also grant + 25% Damage for 60 seconds.

+ 20% Melee Damage against Mutations When you deal Melee damage to a Mutation heal 2 Health and recover 3 Stamina.

+ 40% Melee Damage Your Melee Attacks cause cleave through enemies dealing damage in a large area.

+ 25 Health

+ 15% Reload Speed + 25% Aim Speed + 25% Weapon Swap Speed + 25% Use Speed

When you kill an enemy, gain 5 Stamina instantly and an additional 7 Stamina over 7 seconds, stacking up to 5 times.

+ 15% Stamina + 25% Weapon Swap Speed + 15% Move Speed while firing + 10% Slow Resistance

+ 50% Weakspot Damage - 40% Move Speed while shooting or melee attacking.

Each Melee swing grants 5% Melee Speed and 5% Melee Stamina Efficiency for 6 seconds, stacking up to 10 times. Your Melee Attacks no longer stick in tough enemies. DISABLES: Aim Down Sights

+ 40% Sprint Efficiency When you take damage while Sprinting, you lose all Stamina.

+ 12% Move Speed + 15% Sprint Speed When you take damage, you lose the benefits of Run like Hell for 3 seconds.

Pain Meds you apply also grant + 20% Stamina Regen, + 15% Reload Speed, and + 15% Weapon Swap Speed for 60 seconds.