Unreal Engine 3, the game engine that runs fan favorites like Mass Effect, Gears of War, and Infinity Blade, has been ported to run inside a web browser without any plug-ins. Using JavaScript, specifically the asm.js sublanguage and Emscripten compiler, this engine can run on most any modern web browser. While this is just a tech demo, it goes to show how the web browser is starting to become a completely valid native platform for games.