What is a crash game?

Key takeaways

• Everyone in a crash game watches the same round, but each player bets against the house, not against other players.
• The earliest public record of the format is a BitcoinTalk thread started on 25 July 2014 for the game later renamed bustabit.
• Published figures differ by game: bustabit states a 1% house edge, Spribe lists an RTP (return to player) of 97% for Aviator, and Spaceman’s Game Help states 95.50% while the provider’s product page shows 95%.
• Five things are set by each game’s own help text, not by the genre: the RTP, the maximum multiplier and payout, the bet limits, the cashout settlement rule and the disconnection rule.

The definition of a crash game

A crash game is built around a single number: a multiplier that starts low — at 1.00x in Spaceman and Aviator — and rises to a random stopping point. The stop is the “crash” that gives the genre its name.

Every round repeats the same sequence: a betting window, a rising multiplier, and a crash that ends the round for every bet still in it. The phases are set out in how crash games work. There are no reels, paylines or symbols; the crash games vs slots comparison sets out the structural differences.

A UK Gambling Commission notice to operators on money-laundering risks, published in April 2025, describes crash rounds as lasting from a few seconds to a couple of minutes, and crash games as highly volatile and able to cause significant losses for players.

What makes the genre distinct

• A shared round. Everyone in the game watches the same multiplier and the same crash. Games build social features around this: Spribe describes in-game chat and live bets in Aviator, and Spaceman’s Game Help describes a chat window and a list of the current round’s bets.
• A result shown over time. The game displays a random result as a rising curve instead of revealing it in one step.
• A player-chosen exit. The one decision is when to cash out. Researchers Wang and Pleimling describe crash as a fixed-odds betting game in which the player selects the odds: picking a target multiplier means picking a payout and the chance of receiving it.
• Each player against the house. Their paper, an analysis of online gambling logs in which crash is one of the game types, notes little or no interaction among players. Each bet is settled against the house, and one player’s cashout does not change another’s result.

None of this makes a crash game a test of skill. Spaceman’s Game Help states that it is not a game of skill, and under the constant-RTP model every target has the same long-run average return. What the choice of target does change is covered in cashout timing and volatility.

Well-known crash games

Game	Made by	Date	Source of the date
bustabit (first run on moneypot.com)	Announced by Eric Springer	2014	BitcoinTalk thread started 25 July 2014
JetX	SmartSoft Gaming	2018	SmartSoft Gaming’s game page
Aviator	Spribe	Live January 2019	Spribe’s company timeline
Spaceman	Pragmatic Play	Announced 24 March 2022	Provider’s press release

The dated timeline, including what is not documented, is in the history of crash games. Spaceman has its own section of this site, starting at What is Spaceman?, and the comparison pages set the games side by side.

What every crash game shares, and what varies

The loop is the same everywhere. The numbers and options around it are not, so a figure quoted for one game should never be assumed for another.

Element	Shared across the genre	Varies by game
The round	Betting window, rising multiplier, crash, settlement	Pace, on-screen messages and social features
The result	A random crash point the player cannot influence	How it is produced and vouched for: an independently tested RNG (random number generator) or a provably fair scheme
The house’s margin	Where a provider publishes an RTP, the house edge follows by arithmetic; SmartSoft publishes none for JetX	Its size where published: bustabit states a 1% house edge, Spribe lists an RTP of 97% for Aviator, and Spaceman’s Game Help states a theoretical RTP of 95.50%, while the provider’s product page showed 95% as checked on 2 October 2026
The ceiling	A payout that scales with the multiplier at cashout	The maximum: Spaceman’s Game Help sets 5000x, while Spribe publishes no maximum multiplier for Aviator
The controls	A cashout decision made by the player	Extras such as auto cashout, Spaceman’s 50% cashout or the second bet panel described in Aviator’s in-game rules

What the percentages mean is explained under house edge and RTP, and how Spaceman’s sources differ is set out on the page about Spaceman’s RTP figures. The two ways of vouching for a result are covered under RNG testing and provably fair verification.

Five things to look up in a crash game’s help text

The figures and the edge-case rules belong to each game. The authority for them is the game’s own help or information screen, as offered by the operator.

1. The RTP. The theoretical long-run return and, by subtraction from 100%, the house edge. A figure seen on a review site may not be the one that applies.
2. The maximum multiplier and maximum payout. A game can cap the multiplier, the payout per bet, or both.
3. The bet limits. Minimum and maximum stakes can depend on the operator and the currency.
4. The cashout settlement rule. Whether a manual cashout is paid at the multiplier seen on screen or at the one in force when the server processes the request, and how a pre-set target is settled.
5. The disconnection rule. What happens to a bet if the connection drops before the round, at its start, or while the multiplier is rising.

The Spaceman rules page sets out that game’s answers; the settlement rule is on the Spaceman cashout page.

Crash game guides on this site

Two cover the mechanics of a round and the history of the format.

Four deal with the numbers behind a round.

Four cover fairness, the comparison with slots and common mistaken beliefs.

Sources

• Wang and Pleimling, Online Gambling of Pure Chance: Wager Distribution, Risk Attitude, and Anomalous Diffusion, Scientific Reports 9, 14712 (2019)
• Spribe — Aviator game page
• SmartSoft Gaming — JetX game page
• Pragmatic Play — Pragmatic Play blasts off with Spaceman (press release, 24 March 2022)
• Pragmatic Play — Spaceman product page (checked 2 October 2026)
• UK Gambling Commission — Emerging money laundering and terrorist financing risks from April 2025 (notice for operators)
• Pragmatic Play — Spaceman Game Help, version 1.7 (change log to 10 July 2024), as distributed to licensed operators (cited by name, not linked)
• Spribe — company timeline, for the Aviator date (cited by name, not linked)
• Spribe, Aviator in-game rules, as reproduced by licensed operators (cited by name, not linked)
• BitcoinTalk — 2014 launch thread for the game later renamed bustabit (cited by name, not linked)
• bustabit — published documentation (cited by name, not linked)