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Planning IV

Planning IV upgrade icon

Boosts chance of successfully finding a gem on 4th row to 15.88%

FieldValue
RoomLotto
CurrencyMoney
Base cost1.2M Money
Cost growth1.35x per level before New Game+ adjustment
Max levelNo listed cap
PrerequisiteRequires Planning III.
Cost behaviorNormal room upgrade. Room cost reductions can apply; New Game+ makes cost growth steeper.
Important unlockNo

Purple gem success uses a row-specific base chance plus diminishing luck. Lower rows start safer; deeper rows need more Planning levels to feel reliable.

This upgrade unlocks a system or feature directly rather than applying a simple stat modifier.