If you're looking for an action game I highly recommend soldat:
If you're looking for a free MMO I'd recommend Silkroad:
Yes soldat is 2d, but definately more fun than alot of 3d stuff. I played silkroad for a while, the environments are spectacular, but be prepared for alot of grinding. It's very very well done for a free MMO though. Worth checking out.
THAT WAR ROCK THING IS SICK.
Im gona have to abandon my wii for a while!