User blog comment:MarkvA/5/12 achievements/trophies Undead Nightmare announced!/@comment-1265875-20101021162824

I've been joking that a mythical creature added to RDR in Undead Nightmare will be a unicorn. Of course, this is met with derision and not the laughs I meant it to have, but it seems I might be on to something.

The Secret Achievements now appear on my XBOX (and on xbox.com) and one of the achievement pictures has a unicorn in it! :D