Could Rockstar be planning an HD remaster of Grand Theft Auto: San Andreas?
XboxAchievements spotted a list of 33 achievements for an apparent Xbox 360 version of the game. Furthermore, Videogamer reports that both the PS2 and Xbox versions of the game have been removed from PSN and Xbox Live respectively.
San Andreas was released on PS2 in October 2004 (and then on PC and Xbox the following June) so a 10th Anniversary Edition could be a possibility.
Whether or not the game, if it even exists, is an HD remaster or a straight port of the original remains to be seen.
Grand Theft Auto V will be released on PS4 and Xbox One on November 18th.