The secret location is at the base of the hill on the top left of the map. It is essentially a set of test chambers where the player passes by saying a certain word or phrase. The player is helped by hints in each chamber. For example: One chamber contains a box. When opened, a clock strapped to a baloon flies out. The password is "time flies". As the player progresses through the facility, the puzzles become more elaborate and require furthre thinking.
Occasionally, the player finds boxes scattered aroun the facility, each containing 250 credits. The player also finds diary entries left by someone who has passed through before the player.