Pre-order bonuses seem to be all the rage with the big games nowadays.  Goodies from art books to messenger bags to bonus skins and costumes have all been tossed in as pre-order bonuses over the past few months.  Killzone 2 is no different, with Amazon announcing a free Killzone 2 Home costume and Best Buy offering a PS3 theme for pre-ordering the title with them. 

GameStop is not one to slouch though.  Earlier today, they updated their Killzone 2 entry, announcing one mammoth of a pre-order bonus: an exclusive Killzone 2 demo.  Thats right, pre-order with GameStop and you get access to a single player demo of Killzone 2.  The codes to download the demo off the PSN will be given on February 3rd, a full 3 weeks before the game is even set to hit shelves.

GameStop just got my pre-order!