The multiplayer mode is the key, though. Without that, there isn't much here for a single player to enjoy. Playing against bots is okay, and the survival and (quite clever) soccer game are fun diversions, but nothing beats running around a map full of 32 real players. The controls are spot-on, the maps are great, and once you get used to the mechanics and settle into a character class (this should only take you a couple of games), you'll be rescuing princesses with the best of 'em.
There are even plenty of humorous touches that add to the game's already-ample charm. From the squeaky character voices to the unlockable beards to the awesomely hilarious credits, Fat Princess has a lot to love.