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

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

+ 50% Accuracy DISABLES: Aim Down Sights

+ 50% Reload Speed DISABLES: Aim Down Sights

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

When you or your team kills a Mutation gain 1% damage (up to 15%) until the end of the level.

Each bullet hit causes the target to take 1% increased damage for 3 seconds (stacks up to 15%)

+ 10% Bullet Damage + 15% Effective Bullet Range

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

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

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

Melee kills heal 1 Health and 0.1 Trauma.

+ 100% Stamina Regeneration - 50% Maximum Stamina

Melee hits always Stumble Ridden the first time they are hit. This effect can only occur once per target.

+ 4% Move Speed while using an SMG. + 35% Reload Speed while using an SMG.