While crouching you neither take nor deal Friendly Fire damage. + 10 Health

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

Melee kills heal 1 Health and 0.1 Trauma.

Heal 1 Temporary Health whenever you kill a Ridden within 2.5 meters.

While crouching, gain 10% Damage Resistance and 40% Accuracy.

+ 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

+ 100% Stamina Regeneration - 50% Maximum Stamina

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

+ 50% Accuracy DISABLES: Aim Down Sights

+ 15 Melee Damage + 20% Damage Resistance while using a Melee weapon - 15% Ammo Capacity

Gain + 10% Damage Resistance while you have Temporary Health.

+ 30% Weakspot Damage DISABLES: Aim Down Sights

+ 15% Damage Resistance + 10 Health DISABLES: Aim Down Sights

+ 30% Pistol/SMG Ammo Capacity + 10% Damage with Pistols and SMGs