Unity is a game creation system developed by Unity Technologies. It contains a powerful rendering engine fully integrated with a complete set of flexible tools and rapid workflows to create interactive 3D and 2D content, easy multiplatform publishing, a knowledge-sharing community, thousands of quality ready-made assets in the Asset Store and robust animation system.
It is used to develop video games for web browsers, desktop platforms, consoles and mobile devices, now supporting more than fifteen platforms.
Supported platforms include BlackBerry, Windows, OS X, Linux, Android, iOS, Adobe Flash, PlayStation, Xbox, Wii and Unity Web Player.
Unity Web Player is a browser plugin that is supported in Windows and OS X only, and enable playing of Unity games by using the web browser.
Unity games have amazing quality with excellent graphics and sound and high performance across all platforms, so you will definitely enjoy playing them.
Recently those games are gaining popularity, with thousands of players playing those addicting games every day, huge community of dedicated developers creating new games and new features which are added all the time.
Those games include every genre you can think of. You can play racing games like Speed Rally Pro 2, shooting games like Bugs On Mars, flight simulators games like Orange Jet Fighter, sports games like Super Star Soccer or fighting games like Ultimate Crisis. All of them have the best 3D quality.
You can play them and many others at a unique game site called all3dgames.net which is a great place to find quality Unity games. This site is updated regularly so you can find all the newest games which are handpicked by the editors of this site.
All you need to do is to download the Unity Web Player and install it in your browser (if you have not done it already).
Now it is time for you to make the choice: forget about Flash games, Unity games are much better!