As hardware developers push away from creating faster processors in lieu of multicore architectures game developers have to leverage multithreading technologies to capitalize on these new devices. With multicore mobile devices the need for a multithreaded web based game engine is a reality. This talk will discuss design of various multithreaded web engine architectures that allow for dynamically processing request in threads by using a thread controller. Utilizing HTML5 and JavaScript APIs such as WebWorkers, WebSockets, and WebGL allows for a new standard in 3D browser-based games that are full featured and truly cross-platform, supporting mobile and desktop devices without plugins.