There are several things you can unlock in Max Payne 3 for the PC, PS3, and Xbox 360 from difficulties, to extra modes, and silly character models.
Here are all of the unlockables I’ve found so far. If you find more, please leave comments below to let me know.
Arcade Mode Unlockables
Character Select Option – Complete Story Mode on the Medium difficulty
Advanced Character Model (GBA Model) – Complete Story mode on the Old School Difficulty
Old School Black and White Max – Get a Platinum rank on all chapters in New York Minute Mode
New York Minute Mode – Complete Story mode on any difficulty
One Hit Kill – Complete Story mode on the Hardcore difficulty
Unlimited Ammo – Collect all Golden Gun pieces
Unlimited BulletTime – Earn a Gold medal score on all levels in Arcade mode
Unlimited Painkillers – Complete Story mode on the Hard difficulty with Free Aim
Hardcore Difficulty – Complete Story mode on the Hard difficulty
Old School Difficulty – Complete Story mode on the Hard difficulty