haven't checked online out, but it's probably hard as most the hardcore peoples have fully upgraded units, etc. and there's already an expansion with more upgrades, but expansion costs ms points. so i haven't got a chance to check that out.
it's pretty good, though just so you know, it does kind of get old, though at times it is cool commanding an army with my voice. the WMDs are worth the price, also the price of the game is like $35 at gamestop, probably cheaper preowned.