Practice your skills as a unmanned aerial vehicle pilot. The US military supplies a free playable demo.

Fly the Reaper UAV

and take out targets using Hell-fire missiles.

Screenshot of the game. There is a short video and then the game demo is available. No down load needed. [ Cloud computing technology ]  Use your arrows for flight control. Click mouse to fire missiles. 

Note: Click your weapon selection on wings before you fire. If you run out switch to another weapon. Watch radar blips for upcoming targets. Have fun!   LINK  or click on picture.