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Netherworld: descend again or quit and claim

In the Netherworld every descent moves you down 1 to 20 floors with equal chance, and the run ends at floor 100 or when your descents run out. Quitting claims the reward of the floor you stand on. Descending again risks the run: your curse makes every other floor deadly, and a death with no revives left forfeits everything. The Netherworld calculator puts both choices side by side for the reward you want, with the chance of each amount written out exactly.

Set the run you are in

Pick your key on the left. This guide uses Netherworld Flame Key I, a run with 7 descents, 1 revive and the curse on odd floors. Then enter the cleared floor, the revives and descents you have left, how many descents in a row landed in the same interval of floors, and whether a lucky effect is active. Choose the reward you are after from the list of items the floor chests can hold. The page updates as you type, and the address always carries your inputs, so you can send the link to a friend.

Netherworld calculator on a Flame Key run at cleared floor 96, comparing quitting with descending again for 5,000,000 Silver Safes

A worked case

You have cleared floor 96, you have no revive left and one descent remains, and you want 5,000,000 Silver Safe.

  • Quit and claim. The floor reward opens three chests and keeps the best for your target. You receive 0 Silver Safes with chance 1/2 and 10 with chance 1/2, an expected amount of 5.
  • Descend again. Odd floors are deadly and you cannot revive, so landing on 97 or 99 ends the run with nothing. Every other roll lands on floor 98 or deeper and claims that floor's reward. The result is 0 Silver Safes with chance 11/20, 10 with chance 1/40 and 20 with chance 17/40, an expected amount of 35/4, which is 8.75.
  • The risk. You lose everything with chance 1/10.

Descending again has the higher expected amount, and it also gives you a 1 in 10 chance of an empty run that quitting does not. The calculator shows both so that the choice stays yours.

What the calculator will not guess

When the game data does not establish a rule, the page says so instead of printing a number. It does this for an active lucky effect, for a descent that can trigger the repeat reward, for a landing on a lucky altar, and for floors whose chest contents are not yet recovered. Its compared descent assumes you quit after the next cleared landing.