NieR: The World of Recycled Vessel

To start the DLC, players have to approach the sparkle point in Nier's house, once Grimoire Weiss has joined their party. It will take both into the diary of Nier's late wife/mother, where in NieR RepliCant, players will play as the older version of Nier, whereas in NieR Gestalt, they will play as the younger incarnation of Nier.

In this dimension, they enter a white room, that contains nothing but a big white door and the exit back to Nier's house. When opened, the door leads to various old and new places, that are filled with powerful Shades. After all enemies of an area are defeated, he'll be transported to the next level. Upon completing all areas of the door, Nier is brought back to the white room and another white door will appear, which again unlocks a third white door if all levels are beaten. In total there are 14 challenge maps, 4 to 5 per door. If Nier loses all of his HP during one of the levels, he is thrown out of the diary and his progress of the current door is lost. However, unlocked doors, will remain open.

At the end of the 4th level of the first door, Nier will acquire the one-hand sword Fool's Embrace and the Kabuki costume set after the 5th level.

In the second door, he receives Fool's Lament, a two-hand sword, and unlocks the Samurai costume set, for beating the 3rd and 4th level respectively.

Upon finishing the 4th level of the third and final door, Nier will obtain the spear Fool's Accord. Further, the third level also features a vast amount of boxes, which can contain different types of rare crafting materials. Beating the 5th level only yields experience.

The World of Recycled Vessel, also known as 15 Nightmares, is the first and only downloadable content for NieR RepliCant and NieR Gestalt, and is available on PlayStation Network and the Xbox Live Marketplace for $6.99/6.99€/￥864.
It includes:
- 3 battle mission packs
- 2 new outfit sets
- 3 new weapons
- New types of Shades
- New remixed tracks.

Players get access to the diary of Nier's deceased mother in NieR RepliCant and wife in NieR Gestalt, who died of the Black Scrawl. As the chapters of the diary progress, it shows how Nier's mother/wife slowly succumbed to the disease, and in turn, became insane.