Crash games use terminology from cryptography, gambling mathematics, and blockchain technology. This glossary defines every term you’ll encounter — with the math behind each concept, not just marketing definitions. Terms are grouped by category and linked to our detailed guides where relevant.
Jump to: Core Mechanics · Math & Probability · Fairness & Verification · Game Features · Casino & Business · Strategy & Bankroll · Scams & Red Flags
Core Mechanics
Crash Game — A casino game where a multiplier starts at 1.00x and rises continuously until it “crashes” at a random point. Players bet before the round begins and must cash out before the crash to win their bet multiplied by the current multiplier. If they don’t cash out in time, they lose their bet. The crash point is determined before the round starts using a random number generator or hash-based algorithm. How the algorithm works →
Multiplier — The number that increases during a crash game round, starting at 1.00x. Your payout = bet × multiplier at the moment you cash out. A 2.00x multiplier doubles your bet. A 10.00x multiplier turns $1 into $10. The multiplier’s maximum value varies by game: Aviator caps at 100x, while Stake Crash allows up to 1,000,000x.
Crash Point — The multiplier value at which the round ends. Determined before the round begins by the game’s algorithm. All players who haven’t cashed out at or before this point lose their bets. Also called “bust point” or “crash multiplier.”
Cash Out — The action of collecting your winnings during a crash game round. Can be done manually (clicking a button) or automatically (pre-setting a target multiplier). Once you cash out, your winnings are locked regardless of whether the multiplier keeps rising or crashes immediately after.
Instant Bust — A round where the crash point is at or below 1.00x, meaning all players lose regardless of how quickly they try to cash out. The probability of an instant bust approximately equals the house edge: ~1% for 99% RTP games, ~3% for 97% RTP games. Odds explained →
Round — One complete cycle of a crash game: betting phase → multiplier rise → crash → payout. A typical round lasts 5-30 seconds plus a 5-second pause between rounds, allowing 80-100 rounds per hour.
Math & Probability
RTP (Return to Player) — The percentage of total money wagered that a game returns to players over the long term. A 97% RTP means for every $100 wagered across many rounds, $97 is returned as winnings and $3 is kept by the house. RTP is a long-term statistical average — individual sessions can vary wildly. In crash games, RTP ranges from 94% to 99% depending on the provider. Full RTP comparison →
House Edge — The casino’s mathematical advantage, expressed as a percentage. House edge = 100% − RTP. A 97% RTP game has a 3% house edge. This is the cost of playing and cannot be eliminated by any strategy. How crash house edge compares to other games →
Expected Value (EV) — The average amount you expect to win or lose per bet over the long term. In crash games, EV per $1 bet = −(house edge). So for a 97% RTP game, EV = −$0.03 per dollar bet. This is constant regardless of your cashout target — the mathematical proof is here.
Variance / Volatility — How much your actual results deviate from the expected value in the short term. High volatility means bigger swings between winning and losing sessions. In crash games, your cashout target determines your volatility: cashing out at 1.5x is low variance (frequent small wins); cashing out at 100x is high variance (rare large wins). Both have the same expected value.
Probability Formula — The probability of a crash game reaching at least multiplier m is: P = RTP / m. For a 97% RTP game: probability of reaching 2x = 0.97/2 = 48.5%. Probability of reaching 10x = 0.97/10 = 9.7%. Complete probability tables →
Gambler’s Fallacy — The incorrect belief that past results influence future outcomes. In crash games, each round is independently generated — a series of low crash points does not make a high crash point more likely. The algorithm has no memory of previous rounds.
Independent Events — Each crash game round is mathematically independent of every other round. The crash point is determined by a unique hash, not by any pattern from previous rounds. This is fundamental to how Provably Fair systems work.
Fairness & Verification
Provably Fair — A cryptographic system that allows players to verify that each round’s outcome was predetermined and not manipulated. The game commits to a result before bets are placed, then reveals the proof afterward. Not all Provably Fair implementations are equally transparent — quality ranges from fully open-source (Bustabit) to minimal documentation. Full Provably Fair explainer →
Server Seed — A secret value generated by the casino’s server before the round. Combined with the client seed to produce the crash point. The server seed is hashed and shown to players before the round; the actual seed is revealed afterward for verification. If the casino changed the seed mid-round, the hash wouldn’t match.
Client Seed — A value provided by the player (or derived from a public source like a Bitcoin block hash) that is combined with the server seed. The client seed ensures the casino cannot predict or control the outcome alone, because the final result depends on both seeds.
Nonce — A sequential counter that increments with each round. Combined with server and client seeds to generate unique results for each game. Prevents seed reuse: round #1 and round #2 produce different crash points even with the same seeds because the nonce differs.
Hash Chain — A sequence of cryptographic hashes where each hash is derived from the previous one. Bustabit uses a chain of 10 million SHA-256 hashes, used in reverse order. Because each hash is derived from the next, all future game results exist before any player bets. How to verify hash chains →
SHA-256 / SHA-512 — Cryptographic hash functions used to generate crash points. SHA-256 is used by Bustabit and Stake Crash. SHA-512 is used by Aviator. These are one-way functions: you can verify a hash, but you cannot reverse-engineer the input. This is what makes prediction mathematically impossible.
HMAC (Hash-based Message Authentication Code) — A method of combining a server seed with a client seed using a hash function. HMAC-SHA256 is the standard in crash games. It ensures neither the server nor the client can independently determine the result.
Seeding Event — A public ceremony where the client seed is established in a verifiable way. Bustabit holds seeding events on BitcoinTalk, using a future Bitcoin block hash as the client seed. This proves the casino couldn’t have pre-selected a favorable seed.
RNG (Random Number Generator) — A system that produces random outcomes. In crash games, two types exist: certified RNG (tested by labs like iTech Labs or GLI, used by providers like SmartSoft and Pragmatic Play) and Provably Fair RNG (using hash chains, used by Bustabit, Stake, BC.Game, Spribe). Certified RNG is audited but not independently verifiable per-round; Provably Fair is verifiable per-round.
Game Features
Auto Cash-Out — A feature that automatically cashes you out at a pre-set multiplier. If you set auto cash-out at 2.00x, the system cashes you out the moment the multiplier hits 2.00x. Removes the emotional pressure of manual timing but doesn’t change the expected value.
Auto Bet — Automatically places a bet at the start of every new round at your pre-set amount. Combined with auto cash-out, this fully automates play. Warning: auto bet significantly increases your rounds per hour, which increases your hourly cost. Speed impact on cost →
Dual Bet — The ability to place two separate bets in the same round with independent cashout targets. Available in Aviator, Lucky Jet, and some other crash games. Commonly used to place one conservative bet (auto cash-out at 1.5x) and one aggressive bet (manual, aiming higher).
Bet History / Round History — A display of recent crash points, usually shown as a strip of numbers above the game. This information has no predictive value — each round is independent. The history strip exists for entertainment, not strategy.
Live Chat / Social Feed — Real-time display of other players’ bets and cashouts. In multiplayer crash games, you see when others cash out and how much they win. Some games add text chat. This social layer doesn’t affect the math but creates community dynamics.
Rain Feature — A social feature in some crash games (notably Aviator) where players can send free bets to others in the chat. Used for community building but funded by the sending player, not the casino.
Partial Cash-Out / Split Cash-Out — A feature allowing you to cash out a portion of your bet while leaving the rest active. Available in a few newer crash games. Lets you lock in partial profit while still chasing a higher multiplier with the remainder.
Betting Script — Custom code that automates betting decisions based on predefined rules. Bustabit supports full JavaScript scripting with conditional logic, loss limits, and dynamic targets. Most other crash games offer simpler auto-bet settings only.
Backtesting — Testing a betting strategy against historical game data or simulated rounds. Only available at Bustabit natively. Backtesting shows how a strategy would have performed but does not predict future results.
Casino & Business
Wagering Requirement (Playthrough / Rollover) — The number of times you must bet a bonus amount before withdrawing. A 40x requirement on a $100 bonus = $4,000 in total bets. Higher wagering = more expected loss clearing the bonus. Full bonus math breakdown →
Game Contribution Rate — The percentage of your crash game bets that count toward clearing a bonus wagering requirement. Often 5-20% for crash games vs 100% for slots. A 40x requirement at 10% contribution = 400x effective wagering. Detailed explanation →
GGR (Gross Gaming Revenue) — The total amount wagered minus the total amount won by players. This is the casino’s revenue before operating costs. For a 3% house edge game, GGR ≈ 3% of total wagers.
Configurable RTP — The ability for a casino operator to adjust a game’s RTP within a range set by the provider. Aviator can be configured between 94-97% RTP. This means the same game can cost you twice as much at one casino versus another. Always check the in-game RTP setting.
Casino Originals — Games developed in-house by a casino platform rather than by a third-party provider. Examples: Stake Crash, BC.Game Classic Crash, Duel Crash. Often have better RTP (99%) than third-party games (97%) because the casino doesn’t share revenue with a provider.
Curaçao Licence (1668/JAZ) — The most common gambling licence for crypto and offshore casinos. Provides basic regulatory oversight but significantly less player protection than UKGC (UK), MGA (Malta), or newer frameworks like Brazil’s SPA/MF. Most crash game platforms operate under Curaçao licensing.
UKGC (UK Gambling Commission) — The UK’s gambling regulator. Requires separate licences for operators and software suppliers. Enforces strict rules including an autoplay ban (2025), financial vulnerability checks, and mandatory self-exclusion via GamStop.
KYC (Know Your Customer) — Identity verification required by regulated casinos. Typically involves uploading ID documents and proof of address. Some crypto casinos operate without KYC (“no-KYC”), which offers privacy but reduces player protection options.
Strategy & Bankroll
Bankroll — The total amount of money you’ve allocated for gambling. Proper bankroll management means betting a small percentage (1-5%) of your bankroll per round to survive variance and extend play sessions. Bankroll management guide →
Martingale — A betting strategy where you double your bet after each loss and reset to the base bet after a win. In crash games, Martingale does not change the expected value — it converts many small wins and one catastrophic loss into a pattern that feels like winning until you run out of bankroll. Strategy analysis →
Flat Betting — Betting the same amount every round regardless of previous results. The simplest and most sustainable approach because it doesn’t accelerate losses during losing streaks.
Session Limit — A pre-set maximum for time spent, rounds played, or money lost in a single session. The most effective harm-reduction tool because your total loss = house edge × bet × rounds, so limiting rounds directly limits losses.
Stop-Loss — A predetermined loss amount at which you stop playing. Example: “I’ll stop after losing $50.” Effective only if you actually stop — in practice, the temptation to chase losses often overrides stop-losses.
Scams & Red Flags
Crash Predictor — Any app, website, or service claiming to predict future crash points. These are 100% scams. If the game uses cryptographic hashing (SHA-256, SHA-512), predicting future results is mathematically equivalent to breaking military-grade encryption — impossible with consumer technology. Why prediction is impossible →
Signal Bot / Signal Group — Telegram, WhatsApp, or Discord groups claiming to provide real-time “signals” for when to bet or cash out. These profit through affiliate commissions (you sign up, lose money, they earn a cut) and subscription fees. The signals have no predictive value.
Fake Platform — Websites impersonating legitimate crash games. Common pattern: domains like “official-aviator-game.com” that aren’t affiliated with Spribe. These may use rigged RNG, block withdrawals, or steal deposit funds. Always verify the game provider logo inside the game interface.
APK Scam — Unofficial app downloads promoted as “Aviator APK” or “Lucky Jet APK” that contain malware (keyloggers, banking trojans, data harvesters). Legitimate crash games are played through casino websites or official casino apps — there are no standalone crash game apps from providers like Spribe.
Deepfake Promotion — AI-generated videos of celebrities endorsing crash game predictors or specific platforms. Common in India and Brazil, using likenesses of sportspersons and actors. These are fabricated — no legitimate celebrity endorses crash game prediction tools.
⚠️ Understanding crash game terminology doesn’t change the math. The house edge guarantees a long-term loss regardless of your knowledge level. If gambling is affecting your finances, relationships, or wellbeing, contact GambleAware or the National Council on Problem Gambling.
Related Guides
- Crash Game Algorithm — how crash points are generated
- Crash Game RTP Comparison — all games ranked by house edge
- Crash Game Odds — probability tables for every multiplier
- Provably Fair Explained — step-by-step verification
- Hash Verification Guide — verify results yourself
- Crash Game Bonuses Explained — wagering requirements decoded
- Crash Game Strategy Guide — Martingale, flat bet, and more
- Crash Games vs Other Casino Games — comparative analysis
- Session Cost Calculator — your real hourly cost