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.

Respect to our friends in CPY, PLAZA, Razor1911, RELOADED, HOODLUM, and all scene groups keeping classic FPS action alive. Serious Sam Siberian Mayhem-CODEX

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