Serious Sam Siberian Mayhem-codex [UPDATED]

Classic Serious Sam chaos — hundreds of enemies on screen, secrets, speed, and explosive co-op mayhem (split-screen & online).

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 Siberian Mayhem-CODEX

Respect to our friends in CPY, PLAZA, Razor1911, RELOADED, HOODLUM, and all scene groups keeping classic FPS action alive. Classic Serious Sam chaos — hundreds of enemies