About & Technical Architecture
Spelunky Classic HD brings the original 2008 indie rogue-like that defined procedural platforming to the modern browser. Featuring procedurally generated caves, destructible environments, dynamic physics, and brutal permadeath, this web build captures the precise feel of Derek Yu's original freeware classic.
Spelunky is created by Derek Yu / Mossmouth LLC. This web build ports the original freeware release.
Keybindings & Input Configuration
| Action | Input / Key | Supported Device |
| ● Move | Arrow Keys | Keyboard & Gamepad |
| ● Jump | Z | Keyboard & Gamepad |
| ● Whip / Action | X | Keyboard & Gamepad |
| ● cycle items | C | Keyboard & Gamepad |
| ● throw Bomb | A | Keyboard & Gamepad |
| ● use Rope | S | Keyboard & Gamepad |
| ● Run. | Shift | Keyboard & Gamepad |
Frequently Asked Questions & Save Tips
How does Spelunky Classic HD (HTML5) run in a web browser without downloading? ▾
Spelunky Classic HD (HTML5) is powered by GameMaker HTML5 / WebGL. It executes code directly inside modern browsers via WebAssembly (WASM) and WebGL 2.0 with hardware acceleration and 60 FPS performance.
How does the save system work and how do I back up my progress? ▾
Game progress is handled through Browser LocalStorage/IndexedDB. Save states are stored inside your browser's private IndexedDB sandbox. Avoid clearing browser cache or cookies to preserve your saves.
Can I use a USB or Bluetooth controller with Spelunky Classic HD (HTML5)? ▾
Yes! Modern Xbox, PlayStation, and Nintendo Switch gamepads are supported natively via the browser Web Gamepad API. Connect your controller before launching.
Is playing Spelunky Classic HD (HTML5) on PortedToBrowser legal and safe? ▾
Yes. PortedToBrowser.com indexes open-source engine decompilations and verified web sandboxes. We do not host or distribute proprietary game ROMs or copyrighted binaries.
Port Changelog & Updates
Initial verified release in the PortedToBrowser technical index.
Release date: 2004
Genres: Adventure, Platformer
Host: nxengine.retro-chug.com
Go → Release date: 1996
Genres: Role-playing (RPG), Action
Host: github.io
Go → Release date: 1998
Genres: Shooter / FPS, Action
Host: continuation-labs.com
Go →