All 6 mask you can get from marked ones : r/absolver
Absolver Mask Unlock guide - All Masks -
SpecialReserveGames on Twitter: "Wanna buy an @Absolver mask on its own? You can do that now. And they ship as soon as you order! WOOF! https://t.co/ISLumryzP2 https://t.co/ntvDu1fa8c" / Twitter
Absolver's Halloween update comes with new masks
Absolver - Downfall & Masks, Michel Donze | Mask, Mask design, Art set