A "solid feature" of the (Patch 1.06) for Serious Sam: Siberian Mayhem is the permanent unlock for the Christmas Event via a new New Game+ perk . Key Christmas Features
: By spending a S.A.M. skill point on the "Christmas Time" perk at the end of the New Game+ upgrade list, players can permanently enable holiday content. This allows you to visit the unique Christmas areas and earn the exclusive weapon skin at any time of the year. Serious.Sam.Siberian.Mayhem.Merry.Christmas.v1....
: A unique cosmetic for the XPMR "Burner" Raygun, unlockable by finding a Christmas Tree and completing a special portal challenge on each of the game's five levels. A "solid feature" of the (Patch 1
If you were specifically looking for features from the update (which arrived earlier in August 2022), it added: Guide :: Christmas event: XPMR "Freezer" Raygun weapon skin This allows you to visit the unique Christmas