Co-op, plot-driven game for the Wii?

Is there a good Wii game that’s co-op on the same screen/machine (e.g., Mario-cart or Super Mario Bros) * and *has plot that’s a touch more engaging then “The princess is captured” ?

A FPS would be great. I picked up a copy of Call of Duty: Black Ops, but it seems that the multi-player is limited to online players, not two in the same room. Anything else?

The second Trauma Centre game… might not be what you’re looking for but it’s very original, co-op and a hell of a lot of fun!

Dead Space: Extraction is decent on-rail shooter with a pretty good plot if you’re into survival horror or like the Dead Space storyline. You can play the campaign in two player mode. The game is pretty short and doesn’t have a lot of re-playability, but it’s couple of years old now so you can probably find it for cheap.

Ghostbusters (besides actually being pretty funny) has a plot and is 2 player co-op, so that might be worth checking out.