If you have dawn of war, you need this expansion as you will get the imperial guard and a load of new maps to play on. Ok, il admit it, the imperial guard aren't the best army to use but they do have a lot of tanks available once you research, until then your stuck with cheap, weak soldiers. If your going to get it for anything, get it for the new maps and most importantly, the new campaign missions?! There is a whole new campaign which is far more advanced than the dawn of war campaign. You get to chose to be on the evil or good side of the battle and from then on you get to play with each good team or evil team to complete certain missions. Without telling too much, at the end its basically a free for all to get to the "Titan" and whichever team you chose to get to the titan first will face the Necrons :O Yeah, the Necrons!!! Great game and a really involved and interactive campaign which builds upon the strengths of the original. Definitely get this if you have dawn of war, you will not be disappointed.