It's definitely a game for kids, but with the amount of content, many control options, and simple plot, it's worth $30.
If you've played Rampage before, you know its basically a multiplayer game. Destroying cities is fun and all, but destroying it with friends is all the better.
Plot wise, Rampage doesn't exactly have a stellar track record. Rampage: Total Destruction does make up for it by giving you a well done opening cut scene that basically tells you how the monsters come to be, and gives you the obvious goal of not only destroying everything in your path, but also freeing the other monsters locked up by the game's antagonists.
Rampage: Total Destruction makes leaps and bounds over the gameplay of previous incarnations. While the original arcade only allowed you to punch, jump, and eat people, Total Destruction includes 3-D walking, 3-D building climbing, picking up people and either eating them or throwing them, picking up CARS and throwing them, and a whole mess of special moves that you can unlock by completing optional sidequests.
In addition to the 40-some-odd monsters in the Wii version of the game, the game is also improved upon in content by the addition of the past two titles as bonus content: Rampage, the original arcade game ... and Rampage: World Tour.
The most important thing that has to be remembered when purchasing Rampage is that it is, in fact, a kid's game. Everything about the game is cartoony, and I even think the level of onscreen violence has been toned down from what it was in Rampage: World Tour (people don't get squashed into peach colored puddles of mush like they use to). The humor is for kids, the monsters are for kids, the gameplay is for relatively smart kids, and the game is at its best when four kids are plowing through various cities smashing and eating everything in their path.
Anyone who tells you the controls are tacked on, doesn't know what they're talking about. The game makes good use of varying the gameplay with both buttons and motions, and the game should be commended even more for offering a "single-wii-remote" option of play for those who don't have enough nunchuk attachments (although that single wii-remote config is kind of complicated and not very natural feeling). Lots of effort went into making this game make use of the Wii remote, its motion sensing ability AND its buttons.
All in all, Rampage: Total Destruction is the most in depth and complete take on a classic arcade game that's entire point is destroying and eating everything in sight as an unstoppable killing machine. Its a good budget game for kids, fans, and anyone who knows how to enjoy senseless violence, and although may not be worth your money at normal game price ... its definitely merits consideration at the low cost of 30 dollars.