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Free DLC - Santa's Sweatshop for The Escapist, which was a past free game giveaway from Epic Games.
After suffering Santa's cruel regime for years, it's time you got back home to enjoy Christmas with your real family… Sick and tired of bad working conditions and rubbish pay, you decide to hit Santa where it hurts most and escape Santa’s Sweatshop!
This appears to have always been free on all stores (Steam/Epic/Origin).