Batman: Arkham Knight

					
Unlock ‘I Am the Night’ Mode:

When you complete New Story + mode ‘I Am the Night’ mode will become unlocked.
Unlock New Story + Mode:

When you complete the game under the Normal or higher difficulty setting the ‘New Story +’ option will become unlocked at the ‘Main’ menu. In New Story + mode you will retain your WayneTech upgrades and experience points and you will play under the Knightmare difficulty setting.
Unlock Alternate Ending Sequence:

When you get a 100% game completion you will be able to view the alternate ending sequence. Getting 100% game completion includes completing Riddler challenges and side quests.
Unlock Alternate Costumes:

When the indicated requirement is met the corresponding costume will become unlocked.
Adam West:

PlayStation exclusive pre-order bonus; available to ALL Season Pass owners in Fall 2015.
Anime Batman:

Sign into the game with a WBPlay account.
Batman 1st Appearance:

Amazon pre-order bonus; or included in Serious Edition.
Batsuit v.7.43:

Available by default.
Batsuit v.8.03:

Progress through the storyline.
Flashpoint:

Included in Premium Edition or ALL Season Pass.
New 52:

Free DLC costume.
The Dark Knight Returns:

Included in Gotham’s Future Skin Pack on Steam.