This is a REALLY great game!!! The gameplay is good, and the Campaigns are better, but have no depth and start at completely unnecessary points in the story. The Good Campaign starts in the middle of the first book/movie, and the Evil Campaign starts 3/4 of the way through the second book/movie!!!
The violence is really low, but there are death cries that sound like people throwing up. There's no blood, but the game is rated T, so when people die they clutch their sides and fall down, and larger creatures like Trolls die too dramatically. Also, when Trolls or giant elephants die their skin melts into the ground, revealing their skeleton.
Overall, this is a great game, and the Campagin is actually really fun. Still, if you want a better player-versus-computer mode, then get the second one.