In an apparent leak concerning the upcoming game Batman: Arkham Origins, a list of achievements has shown up on Exophase which lists the names of the achievements, their associated Gamerscore and potential insight into what to expect in the games itself.
The list contains both single and multiplayer achievements. Remember, if you check out the achievements in the site posted in the source link you could potentially spoil part of the fun of discovering them on your own.
Batman: Arkham Origins is to released for the Xbox 360, PlayStation 3, Windows PC and the Wii U on October 25th of this year. The game is being developed by Warner Bros. Games Montreal and published by Warner Bros. Interactive Entertainment.