Those who’ve pre-ordered Borderlands 2 from GameStop are probably well aware that because of this, you’re granted a code to unlock the Creature Slaughter Dome and Mad Moxxi’s Rocket Launcher. You can get a quick look at both of these in the trailer below. Regardless of whether you’re getting the content of not, I recommend you watch it, after all, more gameplay is always a good thing.
Make sure to find yourself some friends to play with because this is going to be one heck of a fight.