Zombie Invasion.
#174: Zombie Invasion. This game is the current favorite of Zach & Zane (and Robert and his whole family). Any time they have computer time, this is the game I am most likely to see. At first I was objectioning because, well, it’s zombies, but then I realized it is sort of cute and funny, so I unclenched a little.
You can get it here: popcap, “Plants vs. Zombies”
In related silliness, this song is now stuck in my head.