Hero Power

Hero Power is a new statistic that determines many things in Vermintide 2. It is granted by equipping items and by leveling up.

Calculation of Hero Power
"Hero power = 10 * Level + (Sum of Item powers)/5"

Since max level is 30 and the maximum item power is 300, the maximum possible hero power is 600. Minimum HeroPower is 12, which can be achieved by having a level 1 character with only two 5 iPower weapons equipped and no trinkets of any kind.

Hero Power Uses
Hero power above a specific minimum is needed to play higher difficulties (which can be avoided by joining a friends game). There is also a maximum hero power for each difficulty level. If you join a mission with a hero power above that limit, it is decreased to the cap.

Difficulty Retrictions
The requirements to start a mission are: For all of these there is a cap as well, it is known for Recruit but not verified for the other difficulties:
 * 0 for Recruit Difficulty
 * 120 for Veteran Difficulty
 * 220 for Champion Difficulty
 * 320 (?) for Legend Difficulty

Combat Effects
Hero Power directly affects:
 * 1) The amount of Damage you deal with every Single Attack
 * 2) The degree of Stagger your attacks produce on an enemy
 * 3) The amount of Enemies your attacks are able to hit simultaneously

Damage calculation
(This is based on numbers from beta)

A simple rule of thumb, 520 HeroPower does double the damage of 20 HeroPower given the same weapons.

The general calculation follows this process:
 * 1) Your HeroPower is put within the allowed interval, i.e. capped to 220 for Recruit.
 * 2) Your damage scaling factor is calculated.
 * 3) Below 20 (i.e. 19 and below)
 * 4) ScalingFactor = 180 + HeroPower
 * 5) If 20 <= HeroPower <= 120:
 * 6) ScalingFactor = 225 + (HeroPower - 20) / 0.25
 * 7) Above 120:
 * 8) ScalingFactor = 200 + (HeroPower - 20) / 0.5
 * 9) This scaling factor is multiplied with the weapon base damage. Note that the scaling factor is extreme, weapon base damage is usually in the interval [0.5, 10] and the ScalingFactor in the interval [192 , 490].