If you've been playing Fallout 3, you've probably found a few Bobbleheads tucked away on dusty shelves and desks. You'll need to collect at least ten to unlock the "Yes, I Play with Dolls" achievement and all twenty for the "Vault-Tec C.E.O." achievement. But even if you don't give a hoot about your gamer score, you'll still need to collect every one of these wobbly figurines to create the ultimate, kickass, Wasteland survivor. That's because there are seven Bobbleheads that boost your core S.P.E.C.I.A.L. stats, and thirteen that give a healthy bonus to your skills. This means you'll be able to spread out your points more every time you level-up, allowing you to max out even more skills.