Chimeran teeth trophy necklace, along with a multiplayer boost that allows players to start online warfare at level 5.
Walmart has "a special set of five custom name titles, including Sentinel." The name tags ...
Sorry, that's just way too boring, we can't bring ourselves to finish explaining. Amazon will have the "No. 60 Air Fuel Grenade" available in the single-player campaign while Best Buy has a special multiplayer skin (pictured) featuring Hale as if he hadn't received the viral inhibitor. Best Buy also has an "exclusive ability in multiplayer to taunt your fallen enemies."
Finally, Canadians and other US retailers will receive a multiplayer skin to be one of the "Black Ops troops" featured in Resistance: Fall of Man and Resistance 2. A final option is just waiting until Insomniac inevitably releases all of it as DLC at some point in the future.