After the code has been redeemed through normal redemption process, please follow these instructions from Sony:
- Defeat the boss of the Cathedral Ward [Vicar Amelia] and examine the altar in the back of the room to change the in-game time to night.
- Go to the Hunter's Dream and receive the Eye of a Blood-Drunk Hunter from a messenger.
- Go to the Oedon Chapel and leave via the left-hand exit to enter the square.
- Go to the right-hand end of the square to trigger an event. This event will take you to the new area: the Hunter's Nightmare.