Rome: Total War is pretty friggin nice, and the multiplayer is fun, filled with lots of desperate last stands. Though its not as good as starcraft, nothing is
Empires: Dawn of the Modern world was a good game but not very got very big, it isnt as good as starcraft or ROME:TW but it has very easy addicting gameplay and if you're good it only takes about 5 min to rush noobs and win (sometimes less) but there's hardly no one online anymore(sigh).