This game is making a come back, Since its addition to the Xbox Live Marketplace's feature "Games on Demand", It has become a lot more popular. It is extremely fun with multiple levels of diffuculty in single player and many different civilisations. There are 2 free singleplayer map packs and 1 free multiplayer map pack, There is also one other multiplayer map pack which costs a measly 100 microsoft points. It is great fun to play with friends and it makes you work for the achievements which take different amounts of time to earn. Definitely recommend buying this game.