Bulletstorm Epic Edition includes Gears of War 3 beta invitation
New box art and info on the Epic edition.
From the Bulletstorm - Epic Edition Amazon page:
For a limited time, pre-order Bulletstorm and receive a free upgrade to Bulletstorm - Epic Edition, which contains the full version of Bulletstorm plus early access to the Gears of War 3 beta, Peace Maker Carbine, boots and armor, 25,000 experience points, and visual upgrades for the iconic leash. Pre-order offer ends on February 21, 2011.
PS3 and PC Users only get the limited edition, basically the same as the epic edition, minus the beta invitation (since Gears is an XBOX 360 exclusive).