AC Revelations: Broken DLC's make the rest of the achievements I have left being unable to be
completed, tried multiple methods etc to fix said issues, and none worked

AC 3: Poorly optimised remaster piece of ♥♥♥♥, can't pay me enough to try and do the menial ♥♥♥♥ in that game

AC Black Flag : Unable to complete due to multiplayer achievements for a dead online service.