Drop Rate Formula

Item Drop Rate

The drop rate of an item is affected by a multiplicative bonus that stacks additively from multiple sources.

Formula:

final_drop_rate = drop_rate * drop_rate_bonus / 100

Variable	Description
drop_rate	Base drop rate of the item as defined in the mob database
drop_rate_bonus	Starts at 100 (neutral multiplier). Each active bonus adds on top of it

Bonuses that contribute to drop_rate_bonus:

Source	Bonus
Base (no buffs)	+100
Bubble Gum	+100

Example: killing Valkyrie Randgris with a 75% Valkyrian Manteau drop while Bubble Gum is active:

drop_rate_bonus = 100 (base) + 100 (Bubble Gum) = 200

final_drop_rate = 75% × 200 / 100 = 150% → capped at 80%

Info

The final drop rate is capped at 80%.