Stun Grenade

The  is an item in Risk of Rain 2.

On hit, it gives a 5% (+5% per stack) chance to stun most non-boss enemies, interrupting most attacks and locking them in place for 2 seconds.

Tips

 * can utilize the Stun Grenade well, since his primary deals rapid damage with a proc coefficient of 1.0. This also makes  irrelevant when it comes to stunning enemies, as Double Tap has no cooldown and should easily proc the Stun Grenade from time to time.
 * can use the Stun Grenade similarly with, although this has a lower proc coefficient and much wider spread.
 * Stunning an enemy is not considered a debuff, and thus does not contribute towards.
 * Stunning an already stunned enemy resets the time stunned back to 2 seconds rather than stacking in overall duration.

Math
The chance to activate is determined by the formula: $$f(x) = \Bigl(1 - \frac{1}{0.05x + 1}\Bigr) = \frac{0.05x}{0.05x + 1}$$

Where $$x$$ is the amount.

Version History

 * Anniversary Update
 * Major Content
 * Added New Lore Entry: Stun Grenade
 * Gameplay Changes
 * Added visual effect when the item procs


 * Early Access Artifacts Content Update
 * Gameplay Changes
 * Chance to trigger now scales by proc coefficient
 * Fix Stun Grenade being able to stun certain characters with stun immunity (mainly survivors)


 * Early Access Scorched Acres Content Update
 * Bug Fixes
 * Set interrupt priority of frozen state to be higher than stun state to fix issues with the  being interrupted by Stun Grenades