| Upgrade Costs | Normal upgrade costs use base cost, cost growth, current level, and any room cost-reduction multiplier. New Game+ makes growth steeper. |
| Room Unlocks and Bodyguards | Each room ends with a one-million bribe paid to a bodyguard. Paying it unlocks the next room, and in New Game+ those bribes scale by powers of ten. |
| Scratch Tickets | Lotto has five ticket types with different risks: number multipliers, monster damage, gem detection, instant wins, and celestial symbols. |
| Score and Currency Formulas | The main room payout formulas in player terms: Darts gold, Lotto money, Pachi tickets, Gacha stuffing, secret currencies, and universal multipliers. |
| Lotto Ticket Internals | The exact player-facing rules behind Orange, Green, Purple, Blue, and Grey Lotto tickets. |
| Shadow Realm | Shadow Realm is the Darts combat mode for permanent gold multipliers, Magician Mousey synergy, poison stacks, arcane damage, and Well Rested marks. |
| Trial Mode | Trial Mode lets you throw nine darts for a permanent gold multiplier and produces Platinum for Ratatooie’s secret shop. |
| Pachi Dice Minigames | Pachi adds Red, Blue, and Green dice bonus games. Upgrades and gacha items increase starting balls, portal behavior, and survival chances. |
| Poker Hands and Pachi Multipliers | Poker Pirate hand rankings, Pachi ticket multipliers, and dice minigame score scaling. |
| Sushi Bonuses | Sushi tracks 70 bonuses, levels, EXP, Perfecto status, shakers, fuel, and wheel wins. |
| Gacha Items and Sets | Gacha contains 81 item effects, 84 saved item slots, active and passive item types, pedestal bonuses, and seven set unlock lines. |
| Gacha Roll Economy | Gacha roll costs, stuffing values, rarity multipliers, active/passive item behavior, and set-planning math. |
| Saving and Settings | The game autosaves regularly, saves from settings actions, and keeps a separate Lethal Mode save path. |
| Save Data and Carryover | What Fortune Mill saves, what New Game+ resets, and why Lethal Mode behaves separately. |
| Languages and Settings | Supported languages, saved settings, scratch size, music, and volume behavior. |
| IdleOn Pet Redemption | After finishing the run, the main menu can open a crossover panel that asks for the first two IdleOn character names and delivers the pet through the Steam ticket flow. |