What exactly do masks do in this game?
I will be getting it next week! I planned not to, but after seeing some gameplay videos I'm hooked.
The one I posted just changes the visuals. The other masks all have varying gameplay effects; some start you out with certain weapons, others make you stronger, one makes you move faster, etc. Not all of them are meant to help you though. Some masks have effects which are just meant to make things more challenging. If you just want a vanilla experience, you can stick with the default mask.