Serious Sam Siberian Mayhem-codex May 2026

Serious Sam returns with a standalone expansion to Serious Sam 4 , plunging players into the frozen wastelands of Siberia. Join Sam "Serious" Stone as he chases General Brand through unforgiving Russian landscapes, armed to the teeth against Mental's horde.

Serious Sam: Siberian Mayhem Developer: Timelock Studio / Croteam Publisher: Devolver Digital Release Date: January 25, 2022 Genre: Action / First-Person Shooter (Classic Arcade-Style) Protection: Steam (Custom DRM) Release Type: ISO / Disc Image Release Name: Serious.Sam.Siberian.Mayhem-CODEX Serious Sam Siberian Mayhem-CODEX

Featuring five new levels blending vast outdoor environments with claustrophobic bases, new weapons (including the experimental Perun crossbow), airstrike call-ins, and upgraded gadgets. The Siberian wilderness introduces new enemies like the mammoth-like Kamikaze and reworked Kleer skeletons, plus side objectives hidden across nonlinear maps. Serious Sam returns with a standalone expansion to