Mission Found Argent D’Nur
Access the Map
After activating the second Secret Skull Switch, just after interacting with the first Wraith, jump down and find the new opening to the right. Follow the tunnel to the back and climb up the ledge. Pull the lever found just ahead to reveal the Classic Map to the right.
Map Strategy
Head up the stairs and then take the narrow steps on the right. Follow the path right until you reach a metallic room. There are numerous secret areas and resources to collect, including the BFG, if you veer off the main path. Otherwise, return to the start and go right. Enter the blue door and exit the map.