Have you heared about the HIT iPhone game angry birds for google chrome. But there's a .exe version too which can be run on your windows PC. This simple theme game is very attractive and addictive. However the touch interface gives more fun than the pc version, it should be a gift for those who dont have an android or iPhone. Follow the below link to download angry birds offline standalone version for your computer.
Download link: Mediafire
Note: make sure that you have the latest display drivers for your device/ graphics card or you may experience some error messages like "Texture is too large" etc