Virtual-On-Web

A WebAssembly / WebGPU recompilation port of Cyber Troopers Virtual-On.

Play in your browser · Releases

Virtual-On-Web translates the arcade game's i960, SHARC, and 68000 CPU programs ahead of time into compiled WebAssembly. An independent Model 2 runtime handles the hardware, graphics, sound, and input, with WebGPU displaying the game.

This is a recompilation (recomp) port, not a decompilation project. It does not recover SEGA's original source code.

Play

1. Open the website in a browser with WebGPU support. Desktop Chrome is the browser used for validation.
2. Select your own von.zip parent ROM archive. The player automatically detects a supported USA or Japan Revision B program inside it. A complete merged archive is sufficient; for split sets, select von.zip together with the regional vonu.zip or vonj.zip. ROM contents are checked before starting.
3. Choose Classic, Enhanced, or Enhanced+, then Launch Virtual-On.
4. Press 5 to insert coin, then press Enter to start.

ROM files are read locally in the browser; the application does not upload them. Older von.zip archives may contain a supported regional program at the root; merged parents may place it in a regional subfolder. When only subfolder choices are available, USA is preferred, then Japan. An Export-only parent needs the supported regional archive as well. Renaming an unsupported ROM does not make it compatible. Complete standalone regional archives also remain supported.

No ROM archives or extracted graphics/audio ROM files are provided. The included WebAssembly binary does contain translated instructions derived from the game programs; the ROM requirement does not change that. See NOTICE.md.

Controls

Action	Keyboard	Standard gamepad
Left stick	W / A / S / D	Left stick
Right stick, up / left / down / right	P / L / ; / '	Right stick
Left / right weapon	Left / right Shift	LT / RT (L2 / R2)
Both weapons	Both Shift keys	Both triggers
Dash	Space (both dash buttons)	LB / RB (L1 / R1)
Coin	5	Back / Select
Start	Enter	Start / Options
Pause / resume	Tab	Tab on the keyboard

The front page has an interactive twin-stick diagram and Keyboard / Gamepad views. The in-screen X saves arcade settings and quits; □ toggles fullscreen. Shift+Tab moves keyboard focus from the game to these buttons. Settings are saved locally per region; this is not a gameplay save-state feature.

Graphics

• Classic: original arcade resolution and 4:3 presentation.
• Enhanced: higher-resolution rendering with a 4:3 view.
• Enhanced+: higher-resolution rendering with a wider view on wide displays.

Status

The first public release is experimental. Both supported regions have passed boot, character selection, combat, and first-match timeout-win progression into the next fight in local validation. Browser checks also cover input, sound, display modes, settings persistence, fullscreen, and quitting/relaunching.

Every character, stage, ending, and knockout path has not been verified. There is no guarantee of complete compatibility or full speed on every machine. An undiscovered compiled instruction path can still stop the game. Networked cabinet play and gameplay save states are not implemented.

Run locally

Node.js 20 or newer is sufficient to serve the included player:

git clone https://github.com/Solid7s/Virtual-On-Web.git
cd Virtual-On-Web
npm run serve

Open http://localhost:8084/. No npm packages are required just to serve or run the unit tests. npm test runs the unit tests; npm run build:site creates the allowlisted GitHub Pages site in _site/.

For browser development checks, run npm ci, install Google Chrome, and use TEST_ROM_DIR=/path/to/your/roms npm run test:player -- vonu enhanced-plus with the local server running. The browser test uses your own USA and Japan archives. Set TEST_ROM=/path/to/von.zip to exercise a parent archive; the test's game argument must match its detected region (vonu or vonj). See BUILDING.md for offline engine rebuilding.

Credits and rights

Original game © SEGA. Characters © SEGA/AUTOMUSS. Character design: Hajime Katoki.

This is an unofficial community project with no SEGA affiliation or endorsement. Software licenses do not grant rights to SEGA's game programs, artwork, logos, or other assets. Read NOTICE.md, THIRD_PARTY.md, and the runtime attribution.