did you play and like advance wars:dual strike?
if you liked dual strike then you would enjoy days of ruin.
there are 26 missions in the main campaign, and around 30-40 trial missions.
the best feature is being able to play people around the world over wi-fi.
i think its a little harder than dual strike, but the new vehicles are much better.
overall its a more realistic, grittier version of dual strike (and includes wi-fi!)