You will start at a castle like map with Elven stuff and some Dunedain as well as heroes. You must defend against waves of attacks and survive or you will surely lose. The enemy computer must be at the bottom and highly recommended for INTERNET ONLY! You will face waves of evil but you will recieve the Gondor Knights and Dol-Amroth Knights as 1st, Rohirrim as 2nd, More Rohirrim for 3rd.
Have fun! (UPDATED FOR ROTWK)