We’ll be excited to see what new breakthroughs are in store once developers have access to the underlying Unreal Engine 4 code that targets asm.js and the Web. Unreal Engine 4 is built to power the next generation of games, and is designed to scale from PC and console to mobile and the Web. “Using Emscripten to cross-compile C and C++ into asm.js, developers can run their games at near-native speeds, so they can approach the Web as they would any other platform.”

“This technology has reached a point where games users can jump into via a Web link are now almost indistinguishable from ones they might have had to wait to download and install,” said Brendan Eich, CTO and SVP of Engineering at Mozilla.

Any modern browser can run asm.js content, but specific optimizations currently present only in Firefox, ensure the most consistent and smooth experience. This performance opens up new opportunities for giving users an astonishing and delightful experience, from within their choice of Web browser. In less than 12 months, optimizations have increased the performance of Web applications using asm.js from 40% to within 67% of native, and we expect it to get even faster. Mozilla and Epic Games have showed the power of the Web as a platform for gaming by porting Unreal Engine 3 to the Web and showcasing Epic Citadel, using asm.js, a supercharged subset of JavaScript pioneered by Mozilla. This video is the first glimpse of Unreal Engine 4 running on the Web without plugins. Today, Epic Games and Mozilla are demonstrating how the Web is continuing to evolve as a powerful platform for gaming by providing a sneak peek of Epic’s Soul and Swing Ninja demos, running in Firefox at near-native speeds.

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