Submarine Crash — HTML5 Provably Fair Game

Submarine Crash is a tense, self-contained HTML5 crash game wrapped in a deep-sea submarine theme. Dive deeper, watch the pressure rise, and cash out before the hull breaks — the further you go, the bigger the payout and the higher the risk. Drop the single file on any static host and it runs instantly: no server, no database, no dependencies, no build step. HOW IT PLAYS Set your bet and hit Dive. The submarine descends and the multiplier rises from ×1.00 upward in real time, accelerating as it goes deeper. Press Cash Out at any moment to bank bet × current multiplier. If the hull breaks before you surface, the stake is lost. A live auto-cashout option lets you set a target multiplier and let the game collect automatically. FAIRNESS Every crash point is generated with the browser's native crypto RNG (window.crypto.getRandomValues), with a Math.random fallback. The crash multiplier is decided before the dive starts and is not influenced by player input. LOOK AND FEEL • Deep-sea aesthetic with bioluminescent blues, sonar pings and pressure gauges • Canvas-rendered submarine descent with bubble trail and smooth acceleration curve • Live multiplier readout with a depth meter and danger-zone highlighting • Hull-break FX: implosion, screen shake and "pressure critical" callouts • Procedural Web Audio sound effects — no audio files to host • Animated preloader with a dive-sequence • Fully responsive: desktop, tablet, portrait and landscape phones • Safe-area insets respected on notched devices BUILT TO CUSTOMISE Crash curve, house edge, dive speed, colours and bet chips live in a single config block at the top of the script. The demo balance is stored in localStorage through load()/save() — swap those two functions for your own API calls (fetch/AJAX) to connect real currency. A public window.game.balance setter is exposed for integration. No frameworks, no external requests, no third-party assets. Open index.html and play. Note: this item ships in DEMO MODE with a local balance and "virtual points only" labeling. It does not process real payments and contains no gambling backend — it is a front-end game template intended for integration into your own platform. All submarine artwork, bubbles and particles are original / canvas-drawn for this item.