Captain Claw demo file-import setup

Prepare the demo files

The tested demo requires ClawDemo.exe, CLAWDEMO.REZ and MSS32.DLL. Use the files from the installed or extracted demo folder, rather than selecting only the installer.

Keep the files together and preserve their names. The game executable and its matching resources belong to the same edition; substituting a retail archive is not a verified shortcut.

• ClawDemo.exe — the original demo executable.
• CLAWDEMO.REZ — the demo’s game resource archive.
• MSS32.DLL — the demo’s supporting audio library.

Import and launch the demo

Choose game files lets you select the required files together. Choose game folder imports a folder. The player stores the imported files locally and does not upload them.

1. Open the Captain Claw browser player.
2. Choose the extracted game folder, or select all three required files.
3. Wait for the player’s status to confirm the import and enable Play.
4. Press Play to start the original executable, then use its Single Player menu.

Keyboard and touch controls

The touch controls map arrows to movement, Ctrl to Attack, Alt to Fire and Space to Jump. Hold movement and an action together when you need to jump across a gap.

Menu / Esc opens the original menu, Fullscreen expands the player and Stop ends the running session. Landscape gives the original 640 × 480 game screen more room on a phone.

The player needs a browser that supports shared WebAssembly memory. The original demo’s La Roca menu-to-gameplay flow has been exercised in Chromium; physical-device behavior and complete campaign play have not been verified.

If Play is still disabled

Check that all required files were imported and that you chose the extracted contents rather than an installer. Compare the filenames with the list above.

If a file is missing, return to the original folder and import the matching set. Do not replace files from an unknown version just to bypass the status message. If the browser reports unsupported runtime features, try a browser/device that supports the player’s requirements.

First launch and recovery

After Play, wait for the original menu before choosing Single Player. A blank or partial frame can appear while the compatibility engine loads. The startup status is not proof that the game screen is ready.

If the game stops or appears stuck, use Stop, then Play. Reloading should restore imports in a regular browser profile. Read Diagnostics for the error before resetting imports.

For shared-memory errors, reopen the player from the arcade in a full browser window. For storage errors, enable local site storage; temporary or private profiles may need fresh imports. Keep the original folder outside the browser.

Keep a copy of your original files

Imports remain in this browser’s local storage. Clearing site data or choosing Remove saved files can remove them. Keep the original demo folder elsewhere so you can import it again.

The original executable determines its available levels. The tested route is the demo; complete retail compatibility, level completion and exact audio parity remain unverified. The separate retail CLAW.REZ engine is a different setup flow.