Ghostbusters is now available for pre-order, and depending on where you buy it you'll be able to score free in-game loot -- a gold proton pack, alternate Ghostbusters suit -- and outside of the game -- a bust of Slimer and and Ecto 1 keychain that lights up and sounds its siren. The tough part is that you can only get certain items by pre-ordering at certain stores, so look at the list below, and pre-order wisely.
