Trivia: After the main credits Riddick gets deloused. Turn around and flush the toilet five times. When you leave your cell, find and enter Waman and Girish's cell. Flush their toilet five times. You will also have to activate Waman's Side-Mission (Kill Molina) (or you can activate Shabby's Side-Mission (Kill Molina) or both). Talk to Mattsson in the Courtyard then go to his cell. When you enter Mattsson's cell you are ambushed by two other prisoners. Kill them and then flush Mattsson's toilet five times before leaving the cell. After the first confrontation with Rust, Molina's cell door will open. Kill Molina, then flush his toilet five times. After doing that, walk into the courtyard and you will see a picture on the wall of the courtyard. The three men in the picture are three of the developers of the game.