Press Start to pause game play, then press Square(2), Circle(2), Left(2), Right(2), Circle(2), Square(2). The screen will flash white and a whooshing sound will play to confirm correct code entry. Note: This must be entered quickly and at a steady pace.
Opening the door in the basement when chasing van Cleef
When in the basement, you will find a health pack and below it a wooden plank. Use your night vision goggles to see
a green line that connects to a door further up. Around that bend is a patrolling guard. Kill the guard and pick him up. Walk over to the plank and place the body there. The door that the green line you saw earlier connects to is now open.
