All of these Editions of the games...

I found out about the game from my job, and I only thought there was a special Wal-Mart edition...

Buy special Wal-Mart edition and get a shotgun and some silly boots... Come here, see all of the awesome stuff everyone else got from these editions I had no Idea about.

Where do you get these other editions? Is there a way to get these items/extra missions without buying another copy, that is also potentially more expensive??

I'd gladly trade my mbs boots and shotgun for those light colors/extra missions...