WASM-4 is described as 'Low-level fantasy game console for building small games with WebAssembly. Game cartridges (ROMs) are small, self-contained .wasm files that can be built with any programming language that compiles to WebAssembly' and is a game development tool in the development category. There are more than 10 alternatives to WASM-4 for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best WASM-4 alternative is TIC-80, which is both free and Open Source. Other great apps like WASM-4 are PICO-8, quadplay, Pixel Vision 8 and atto.