Adrenaline in-game picture.
|Extra effects:||Regen HP|
Adrenaline is a passive skill that increases the Tank's health regeneration rate by 3 times. It is similar to the Medic's Rapid Regeneration. However, Rapid Regeneration is an active skill and increases teammates' health regeneration rate by 10x.
Adrenaline is a great passive skill as it allows the Tank to regenerate health 3 times as fast. This increases his overall survivability. It kicks in automatically, so there is no need to do anything.