User blog comment:MarkvA/Free Hunting and Trading Outfits Pack for Red Dead Redemption Coming October 12th/@comment-81.156.174.150-20101005183021/@comment-1849713-20101005184847

Or maybe you used a code for it (bought, got in Special Edition or pre-ordered version), eventually you downloaded an old, unfinished, full of bugs version of that Pack and you didn't delete this.