How Crash Games Work: Multipliers, RTP and Provably Fair
A crash game is a multiplier game. Each round, a multiplier starts at 1.00x and rises until it “crashes” at a random point. You place a bet before the round and cash out at any moment before the crash; your payout is the stake multiplied by the multiplier at that moment. If the round crashes first, the stake is lost. Aviator by Spribe is the format’s reference title. The format looks like a test of timing, but the crash point is fixed before the round begins.
This page is part of our crash games guide, within the wider casino game guides.
What Happens in One Round
- Betting window. You place one or two bets and optionally set an auto cash-out target (for example 1.80x).
- Crash point generated. The game’s server has already determined the crash point, typically from a cryptographic hash chain.
- Multiplier rises. The animation shows the multiplier increasing; in Aviator it is a plane climbing.
- Cash-outs. Any bet that cashes out (manually or automatically) is paid stake x current multiplier.
- Crash. All bets still open are lost. The result is added to the round history.
Example at A$2: cash out at 1.5x for A$3 (+A$1); at 5x for A$10 (+A$8); if the round crashes at 1.30x with a 1.5x target, you lose A$2.
The Maths: Chance of Reaching Each Multiplier
Most provably fair crash games use a distribution in which the chance of the round reaching a multiplier m is approximately RTP / m. With a 97% RTP:
| Cash-out target | Chance the round reaches it | Payout on A$10 | Expected return on A$10 |
|---|---|---|---|
| 1.10x | 88.2% | A$11 | A$9.70 |
| 1.50x | 64.7% | A$15 | A$9.70 |
| 2x | 48.5% | A$20 | A$9.70 |
| 5x | 19.4% | A$50 | A$9.70 |
| 10x | 9.7% | A$100 | A$9.70 |
| 100x | 0.97% | A$1,000 | A$9.70 |
The last column is the point: every target has the same expected return, 97% of the stake. Your choice of target changes only how often you win and how big the wins are, not the house edge. A 1.10x target wins nearly 9 rounds in 10 but loses the whole stake when it fails; a 100x target wins about 1 round in 103.
The same model implies that a share of rounds crash almost immediately. In a 97% game, about 3% of rounds end at or near 1.00x, before any target can be reached.
RTP of Common Crash and Crash-Style Games
| Game | Developer | Format | RTP |
|---|---|---|---|
| Aviator | Spribe | Multiplier crash, two bets per round | 97% (Spribe figure) |
| Chicken Road | InOut Games | Step-by-step cash-out, 4 difficulty modes | up to 98%, depends on mode and operator |
| Other crash titles | Various studios | Rocket, plane or chart themes | typically 95% to 99% |
Always confirm the figure in the game’s info panel at your casino. Chicken Road shows why: its quoted RTP depends on difficulty and operator configuration.
Provably Fair: How You Can Check a Round
Many crash games are provably fair. The idea is that the server commits to a result before the round in a way you can verify afterwards:
- The server generates a secret server seed and publishes its hash before the round.
- One or more client seeds are added. Spribe’s documentation describes combining the server seed with client seeds from the first players to bet in the round.
- The combined value is hashed (for example with SHA-512), and the hash is converted into the crash point.
- After the round, the server seed is revealed. You can hash it yourself and confirm it matches the commitment and produces the same crash point.
This proves the result was not changed after bets were placed. It does not prove the game’s RTP is favourable, and it does not let anyone predict future rounds. Our provably fair guide explains the hashing process step by step.
Two Bets, Auto Cash-Out and Auto Bet
- Two bets: Aviator lets you place two independent bets in the same round, for example one at 1.5x and one at 5x. Both carry the same 3% house edge.
- Auto cash-out: executes at your target even if you are distracted or your connection lags; it removes timing errors, not risk.
- Auto bet: places a bet every round. Rounds last seconds, so auto bet can turn over a budget very quickly. At A$2 per round, if a new round starts about every 10 seconds (6 per minute), that is A$720 of turnover per hour.
Why Crash Games Feel Controllable
The cash-out button gives a sense of control, and round history invites pattern-spotting. Neither changes the odds. Each crash point is independent, a run of low crashes does not make a high one due, and “predictor” apps that claim to read the next round are scams. Strategy options and their limits are covered in crash game strategy, and the general trap is explained in the gambler’s fallacy.
Related Instant Games
The same RNG-plus-multiplier idea powers other instant games: Mines, where you reveal tiles; Plinko, where a ball drops through pegs; and Dice, where you set your own win chance. For the studio behind Aviator, see Spribe. Casinos offering Aviator are compared on our Aviator casinos list.
Frequently Asked Questions
The crash point is generated before the round starts by a random number generator, usually through a provably fair hash process. The rising multiplier on screen is an animation of a result that is already fixed. Player bets and cash-outs do not change it.
In the standard crash model with a 97% RTP, the probability of a round reaching a multiplier m is about 0.97 divided by m. For 2x that is about 48.5%; for 10x about 9.7%; for 100x about 0.97%.
Spribe lists Aviator’s RTP at 97%, meaning a 3% house edge per bet over the long run. That applies whatever cash-out target you choose.
No. Each crash point is independent. Round history shows past results only, and apps or Telegram channels claiming to predict Aviator rounds are scams.
Crash games are online casino games. Offering them to people in Australia is prohibited under the Interactive Gambling Act 2001, so they are only available at offshore casinos, which are not regulated in Australia.
Gambling is for adults 18+ and should stay within a budget you can afford to lose. Free, confidential support is available 24/7 from Gambling Help Online on 1800 858 858.