by Metalor 15 Aug 2015, 00:01
I'm going to assume that you're on map 5. In which case, find the elevator that you started the map in. If you want to find the secret exit, take an immediate right inside of the purple room and examine the wall to find a secret. There are 4 additional secrets beyond that inside that secret (you'll know it by the quality of treasures inside constantly improving). Then on your right side, you should see a Green Key Door, enter inside and there's the secret elevator and an extra life for your trouble.
If you want to find the basic elevator, start from the entrance elevator and inside the purple room go out the door into the large mine-esq hallway. The Green Key Door is right across from where you come out. Behind that are two more Green Doors and a room filled with Moss and Officers the exit elevator is in that room. It's marked with a chest treasure item to the elevator's right side.
If you're on map 4, simply find the room with the 4 wooden sheds and the large steel box in the center. The exit is through the Green Key Door after passing through two empty corridors with a pair of Mutants at the end (one is inside the elevator).