Great online, terrible campaign, fun & addictive arcade rail shooter mode.
The first thing I did after I opened up this game was play the first two levels of the campaign. Why only two? They were boring and the AI was stupid. AI would almost always aim for you and not your allies and would constantly run up to you and stand still while you shot them.
*Arcade rail shooter*
Highly addictive, especially if you have a zapper/home made zapper like creation. Put it on veteran or hero difficulty and you will be addicted to it. This mode basically takes you through the same story as the campaign mode, but the entire thing is on rails and the AI are not nearly as idiotic, they actually hit you for one, deplete your health for another, and even sometimes kill you! Also, your weapon is chosen for you, this presents a challenge while using a pistol/shotgun against a large group of people.
*Multiplayer online*
VERY fun! No AI to be idiotic, highly addictive and very fast paced. Only downside is that the death rate can be quite unpredictable at times, sometimes the same gun wont kill at same rate.
I remember absolutely hateing it at first, then I realized how good it was! Online is solid, rail shooter is classic and provides lots of good play time. Beware! The game is only multiplayer OVER THE INTERNET! You cannot play against someone else on the same Wii.