Upgrade Costs
Normal upgrade costs use base cost, cost growth, current level, and any room cost-reduction multiplier. New Game+ makes growth steeper.
For normal upgrades, each next level starts from the upgrade’s base cost and multiplies by its growth rate once per current level.
Room coupons reduce normal shop costs, but the five bodyguard bribes and five main coupon upgrades ignore that reduction.
In New Game+, the game increases each upgrade’s growth pressure by taking the extra growth above 1.0 and multiplying it by 1 + 0.25 x NG+. Bodyguard bribes instead cost one million times ten for each New Game+ layer.
Patch Notes
Section titled “Patch Notes”- June 9 PDT MacOS and balance patch reduced key Gacha, Lotto, Pachi, and Poppy upgrade costs, including capsule unlocks, Unlock Purple Ticket, Movement Mittens, Red Dice Game, More Red Balls, Auto Lever, and Double Spin Chance.
- June 5 PDT New Game+ patch added 40 NG+ upgrades in the Darts NG+ Shop, so late-loop costs are no longer explained by base-shop growth alone.