2009 has certainly proven itself to be The Year of the Tower Defense Game.  Their market saturation is matched only by their 
crack-addictive gameplay.  Vogster is putting 
Robocalypse through one more go-around on the Wii with 
Robocalypse: Beaver Defense.  (At this point I will snicker and not make jokes about the subtitle, but I will 
hint at the fact that there's a gradeschool-level joke there by 
saying that I will not make a joke.  Follow?)  In case you're unfamiliar with the genre, tower defense games -- and likewise, 
Robocalypse: Beaver Defense -- is all about strategically positioning static weapons on a battlefield and utterly annihilating any and all enemies running past their perimeter.  It's like all the good parts of an RTS if your winning strategy is turtling.
Oh, 
I get it now.  It's called "Beaver Defense" because you're building up a 
dam of defenses to stop the 
stream of enemies.  It wasn't about what I was thinking at all!
These pics reveal the damming evidence: