Explorers, get ready! A way has been found to gain (illegal) access to the B-423 military complex, an abandoned American base that closed in a hurry in 1991, for mysterious reasons. This base is spread over several floors ....Quick! A secret entrance has been discovered on the 3rd floor .... A technical room prohibited to the public, a ventilation duct ... it is up to you to find the entrance of the B423 base security post and explore the area ... it seems that you are not completely alone ...