Adrenaline

Adrenaline is a core feature of surviv.io. It allows the player to heal health over time, as well as move faster if the adrenaline bar is over 50%, and move even faster above 90%.

Game effects
Adrenaline comes into use both during and after a firefight. It's handy to always have at least some adrenaline just in case one gets into a firefight with another player. During a fight, one may be able to stand behind cover and slowly regain some health. They can also attempt run away if their adrenaline bar is above 50%.