able item in Hotline Miami. At the beginning of each chapter from the main story, the player chooses a mask for Jacket to wear. There are 25 unlockable masks in total, each providing a unique effect, save for the default mask, Richard. The effects include but aren't limited to making door slams lethal (Don Juan), inverting the player's controls (Nigel), and giving the player a drill at the start of the chapter (Carl).
Masks can be unlocked by getting sufficiently high scores, as well as being found in certain chapters.
The player can see whether one already has the mask for a given chapter, in the chapter selection screen. Although not all available masks will be shown there (see e.g. Carl in Chapter 8).