Per Kotaku, it looks like there is one more unlockable Batsuit for Batman Arkham Knight. However, this certain Batsuit has some specific requirements to unlock. You can check out a video of the Batsuit v8.05 – Prestige Edition in the player below.
This costume was a part of the recent December DLC update, which included things like Season of Infamy and also The Dark Knight 2008 movie Batsuit. In order to unlock this costume, players have to complete the entire main campaign and New Game+. After that, they will have complete the DLC campaigns as well. After the 240 percent game completion is achieved, players will be able to equip this tweak on the Batsuit. It looks very similar to the new Batsuit for Arkham Knight, except it has some color tweaks and a golden Batman emblem on his chest.
Per the Kotaku report, the Prestige Edition Batsuit has also been unlocked through manipulation of the game’s code in the Windows PC version of the game. This is because the Batsuit can be accessed through the game’s files. Unfortunately, the only way PlayStation and Xbox One owners can get this Batsuit is through actually playing the game.
The December DLC update, which features the Prestige Edition Batsuit is available now for Batman Arkham Knight.