I tried looking this up with no success, My friend and I play on 360, we made it to the end of the game, killed three of the guardians, then he died on the last guardian, Now when we go to the chamber all the guardians are sleeping and will not wake up. we have restarted and everything else, even read up on another glitch to destroy the portals then, see if the last main guardian takes any damage, but still no luck, wasnt sure if other ppl ran into this and new of a way to fix it or are we screwed and start over.