Redemption Road is a fan-generated, large-scale AU project created by various members of the SPN and Dean/Castiel fandoms.
http://spn-redemption.livejournal.com...
With Castiel having set himself up as the new God, drunk on power and volatile as a nuclear reactor, Dean, Sam, and Bobby find themselves on the run from the jealous, capricious monster wearing the face of their friend. Desperate for protection and wary of his brother’s mental state since Castiel unlocked Sam’s memories of Hell, Dean knows Castiel must be defused before he can wreak further havoc in Heaven or on Earth. Although Bobby advocates for destroying Castiel by whatever means necessary, Dean is convinced the Cas he once knew still remains, buried somewhere beneath the mass of poisonous souls and calling out for help. Determined to save the angel who once rescued him from Hell and redefined his purpose in life, Dean himself must resist the allure of the false deity vying for his obedience, and come to terms with the knowledge, long-suppressed, that his feelings for Castiel run much deeper than brotherhood. It is this bond, and the dubious distinction of the Righteous Man, that will ultimately grant Dean access to where Castiel’s grace languishes in Purgatory. However, what Dean brings back with him is broken, angry, and only half-angel, certainly not the Castiel he remembers—and nor is it the only thing that returns to Earth with them…
Art credit: http://spn-redemption.livejournal.com...
Words: 652,223 complete in 42 parts