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Technology, Performance and Optimization

This site utilizes our highly optimized JS-DOS library for enhanced performance

Supports stereo output at a 44.1 kHz sample rate. Resolved audio popping and crackling issues, significantly reducing audio latency.
Supports 3Dfx Voodoo 3D hardware acceleration, resolution upscaling and anisotropic filtering.
Gamepad support.
Full support is provided for both Roland MT-32 and General MIDI. For General MIDI, you can choose from a range of soundfonts with varying levels of quality. By default, games are configured to prioritize General MIDI if both are supported.
The FPU subsystem has undergone a complete overhaul, enabling full compatibility and optimal performance for games employing specialized instructions.
Screen latency has been reduced by over 50%, resulting in significantly improved responsiveness.
CD swapping functionality and support for compressed CD audio formats.
Extensive code optimization has been implemented, resulting in a performance improvement of approximately 5%-10% in certain games compared to the original library.

Despite the aforementioned optimizations, running games in the browser still necessitates a CPU with robust single-core performance.
During the rapid advancement of CPU technology in the 1990s, processor performance saw significant improvements. For instance, games from 1995 had considerably different CPU requirements compared to those from 1997.
If a game fails to run smoothly, we recommend lowering the resolution and graphics quality settings through the in-game options.
You can run the benchmark to estimate your CPU performance when running legacy games in the browser.

We recommend the Apple Silicon M6 as the best CPU for running the games on our website. Based on current testing, the M6 offers the highest performance, and the Mac mini provides the best value for money.

Gameplay and Menu Functionality

Please wait while the game loads on your first visit. Starting again or changing discs may also need some download time.

Once the game has started, additional functions can be accessed from the control menu at the top.
CD Swapping. For multi-CD games, you can select the appropriate CD when prompted to change discs. Once selected, the corresponding CD image will be downloaded and unpacked as needed.
Pause or resume the gameplay.
Mute or unmute.

Save your progress in the game first. Next time, use the same device and browser, choose Continue game, then load your save in the game. On your first visit, the option is called Start fresh.

The save list chooses an available cloud save first, then a browser save, then Continue game or Start fresh. To use your latest progress here, choose Continue game.

You can also keep a backup using the buttons above the game:
Save to the cloud and use it on another device after signing in (Gold members only).
Save in this browser. Next time, choose Browser from the save list to load it.
Download a save file. Next time, choose Upload to load it.
Backups only change when you save again. Wait for saving or downloading to finish before closing the page.
Loading a cloud, browser, history or uploaded save returns to that saved point and may replace newer progress.
Clearing this site's data can remove your progress and browser saves. Keep important saves in the cloud or download a backup.
After exiting the game, wait for shutdown to finish, then back up your save and close the page.

Browser Compatibility

For optimal compatibility, it is recommended to use the latest version of Chrome.
Browsers based on the Chromium engine, such as Edge, are also expected to be supported.
We now support both Firefox and Safari. To ensure compatibility, please update to the latest version of Firefox and the latest iOS or macOS.