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

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

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

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

Melee kills heal 1 Health and 0.1 Trauma.

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

+ 20% Stamina + 20% Sprint Efficiency + 5 Health

Melee kills heal 1 Health to yourself, and teammates within 10 meters.

+ 20% Stamina + 20% Stamina Regen + 3% Move Speed + 5 Health

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