Crystal Caves C Port

This is a clean-room, decompilation-driven port of the 1991 Apogee Software shareware classic Crystal Caves Episode 1 developed by vital101. Written in freestanding C and compiled to WebAssembly, it runs directly in modern web browsers without DOSBox or emulators. The port re-implements the original game logic and verifies level rendering, physics, cell events, and sound effects frame-for-frame against the original DOS binary.

How to play

Default keyboard controls adhere to the original DOS layout with modern browser additions:

• Left / Right Arrow: Move
• Ctrl, Space, or Up Arrow: Jump
• Alt: Fire or interact
• Esc or F1: Help menu
• P: Pause

Key bindings can be modified in the help menu and are saved locally. Gamepads are supported via the Gamepad API but disabled by default. On touch devices, an on-screen virtual pad and helper keyboard buttons appear automatically.

What you need

Nothing to install or upload. The page runs the shareware episode.

Good to know

• Saves (slots 0–9), settings, and high scores are preserved entirely client-side using browser localStorage.
• On macOS, using Space or Up Arrow to jump avoids system shortcut conflicts when holding Ctrl.