Siberian Mayhem (v1.06 Вђ“ Merry Chr...: Serious Sam:

The Merry Christmas Update (v1.06) for Serious Sam: Siberian Mayhem, released on December 18, 2022, introduces seasonal content, including the "Freezer" skin for the XPMR Burner Raygun, and a permanent New Game+ mode. This update also adds, improved co-op, and various gameplay fixes, allowing for the unlock of festive content through hidden challenges. For full technical details, you can view the official patch notes on Steam . Siberian Mayhem - Merry Christmas Update 1.06 - SteamDB