How much it costs: £260+ (new) Come on, who doesn't want a miniature replica of Master Chief's iconic helmet that serves as a protective case for your collection of the original Halo trilogy? Okay, so you've probably finished the fight against The Flood more times than you can count by now, but that doesn't matter - you can just slot 343 Industries' currently-ongoing follow-up to the originals in that fancy holder instead. Bungie won't mind, they're too busy working on Destiny to notice, I promise. Making-of documentaries, Machinima, soundtracks and exclusive storyboard art fill out the remaining space inside the glossy box, but let's face it - we all want it for the helmet. There's a reason why that plastic head protector can fetch a high price all on its lonesome, after all.