How to unlock the Zwat skin cosmetics in Back 4 Blood

gamepur.com:

Being rewarded for earning certain criteria in a game is always a great feeling, especially when it comes from overcoming a challenging obstacle. In Back 4 Blood, these rewards are not openly expressed, but they have some. For example, unlocking the Zwat skins for your Cleaners will take a pretty significant amount of time, skill, and patience. Here is how to get the Zwat cosmetics in Back 4 Blood.

Related: How to get the Hazmat suit costumes in Back 4 Blood

To get a Zwat skin in Back 4 Blood, you must beat every single level in the Campaign on Nightmare difficulty with that Cleaner. For example, if you beat the first few levels with Evangelo and come back with Mom and finish the rest of them, you will not get Zwat for either character until you go back and play those missed levels with each character. Meeting that accomplishment with one character will only unlock Zwat for that Cleaner.

Beating all of the Nightmare levels will be a true test of skill and teamwork to begin with, but doing so with one character really shows how good you are with them. Whoever you attempt to do it with, make sure you have a team you can rely on with good communication. Once you have beaten every Campaign level on Nightmare with a character, open up the Cleaner tab at the Fort Hope base and equip your new badass skin to show off your mastery of that character.