Endless ATC is a realistic and easy to play radar simulator. As an approach controller at a busy airport you guide as many planes as possible safely to the runways. This version has much variety with multiple airports and additional options:

• four airports (Amsterdam Schiphol London Heathrow Frankfurt and Atlanta Hartsfield-Jackson)
• wind and storms
• areas with altitude restriction
• adjustable radar delays to increase realism.

That plus all the features from the free version including adaptive traffic rate pilot speech unlimited randomized gameplay. If you haven't tried the free version yet get it here:
https://play.google.com/store/apps/details?id=com.dirgtrats.atcradar

For detailed instructions see: http://startgrid.blogspot.com/2013/11/endless-atc-instructions.html