Well this is the correct section if anything for the game ends with Episode IV.
You can get the Death Star and blow up planets. Control Palpatine, Vader, Boba Fett, Mara Jade, and gain Imperial Star Destroyers. You can get Red Squadron (Luke's squadron), Han & Chewbecca, Leia, Obi-Wan, and Mon Montha (sorry for spelling). The space battles are pretty fun and the battle cam allows you to watch the battles like a movie but the ground battles remind me too much of Galactic Battlegrounds and is a little boring.
All and all I give an Empire at War a 3 out of 5. But if you want an RTS game that is fun that will keep you playing hours on end you should get the Lord of the Rings: The Battle for Middle-Earth II which is an wonderful game even if you don't like the Lord of the Rings.