I absolutely recommend Darksiders, especially at $15. I bought it — for $20 on Amazon — and beat it about a month ago. I thought it was a great game. If you like the Zelda games, then you'll be right at home with Darksiders, since it follows a similar formula, and Darksiders is structured in such a way that always keeps the game interesting (there's always new stuff to obtain and explore). The only part of the game that I've heard people complain about is the final quest, but I thought it was fine, since I opened up all the teleport locations, and by that time, you have a certain mode of transportation that helps — plus, I liked going back to the places earlier in the game where I needed an item that you only obtained later in the game. Also, the ending of Darksiders was fucking awesome; I can't wait for Darksiders 2.
Wow, not even my huge ever growing pulsating backlog can beat a glowing review like that. I'm in for Darksiders on 360 - thanks Razzuel and Cheapy.