Games Playable on 3DS Internet Browser: None - Browser Too Limited

You cannot play games in the 3DS Internet Browser. It's a basic HTML viewer with:

• No Flash, Unity, WebGL, or modern JS support.
• Very limited RAM/CPU for the browser process.
• No input mapping for game controls.

Some simple HTML5/JS demos may load, but they're unplayable.

To Play Games on 3DS

• Download from Nintendo eShop (hundreds of titles, including Virtual Console).
• Use homebrew (custom firmware) for emulators/ports—voids warranty, proceed at own risk.

The browser is for reading guides, not gaming.