The penultimate edition of Billy's advice for gifting has arrived! Our Holiday Guides are the most important, for one simple reason: if you give a co-op game, chances are, you'll get to play it! That really makes the joy of giving just that much better, doesn't it? Here's our list of the best co-op titles available for the Playstation 3, sorted by who you're giving them to. Can you spot the celebrity guest this time?