This is our proprietary skill rating calculation. This has nothing to do with official game ranking or MMR.
The purpose is to show player skill levels relative to other players, not estimate MMR.
Reduce the Cooldown of Shoulder Bash by 4s.
Increase your maximum Health by 150.
Gain 10% Lifesteal.
Increase your maximum Ammo by 3.
Reduce the Cooldown of Siege Shield by 4s.