Limbo is the simplest originals game: you pick a target multiplier and the game draws a random number. If the drawn number is higher than your target you win the stake times the target; if lower, you lose.
Why it is a relative of dice
Mathematically limbo and dice are the same game in a different shell. In both you choose the win chance yourself and in both the house edge is usually 1%, i.e. an RTP of 99%. The difference is only in the interface.
The choice of volatility is entirely yours
A target of 1.10× wins almost every round and adds a little. A target of 1000× wins once in a thousand rounds. The expected value is identical in both cases — what differs is only how long the balance lasts and how large a share of the result comes from a single hit. See volatility.
The auto-mode trap
A limbo round lasts an instant and in auto mode hundreds of rounds run per minute. At a high target that means the budget disappears before a hit has time to come. Set a loss cap before you start — the loss limit calculator helps find the number.
Verifiability
Like the other originals games, limbo is provably fair — the result can be recalculated yourself after the round.