Steam Community :: Guide :: Exclusive Content not sold via PD2 store page
Leaked Paydaycon Mask Reward : r/paydaytheheist
M0rtifer on Twitter: "Let's start the #PAYDAY2 mask giveaway with the PAYDAYCON 2015 mask. Other masks coming very soon! All codes are used? More codes on Instagram, Facebook and in the community
Steam Community :: Guide :: Mask Collector's Handbook
PAYDAY 2 - Mega Clover Mask (PAYDAYCON 2016) DLC Steam CD Key | Buy cheap on Kinguin.net
Payday 2 - PAYDAYCON 2015 The King of Jester's Mask (DLC) - Steam (GLOBAL) | eBay