Unity is a cross platform game engine that enables developers to create amazing 2D and 3D games with excellent graphics and sound.
Those games look great and run fast across all platforms.
A huge community of developers support this game engine, and new quality games are released every day.
In order to play Unity games on your browser you need to install the Unity web player plugin which is available for Windows and Mac on all major browsers. The plugin can be downloaded freely from the following link: Download Unity