I am trying to get the "One With the Shadows" achievement but it almost seems impossible. Im a lvl 74 who has done nearly everything in the game with the exception of a few side quests, and maybe a few main quests that I just haven't stumbled upon yet. I have done everything the Thieves Guild asked of me, yet I havent recieved the "Darkness Returns" quest, the "Blindsighted" quest, nor the " Under New Management" quest, which I know is the final quest to become Thieves Guild Master. Brynjolf is by the marketplace in the center of Riften and only replys to me "Sorry lad, ive got important things to do, we'll speak another time". I thought maybe Karliah would trigger a quest but she is no where to be found. I cannot access Nightingale Hall, Irkngthand, or Twilight Sepulcher because the quests haven't been started. Ive done the 5 side missions in the 4 holds (Solitude, Markarth, Whiterun, Windhelm) from Vex & Delvin and completed the 4 Special Quests from Delvin. I do not want to restart my game progress seeing as numerous hours have been put in already, and for all I know i'd probobly end up getting the same glitches in the new game. Any thoughts or ideas on how I can recieve these Quests to obtain the One With the Shadows achievement?