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Serious Sam: Siberian Mayhem is a standalone chapter in the Serious Sam series, co-developed by Timelock Studio and Croteam and published by Devolver Digital. It released on PC on January 25, 2022 and does not require Serious Sam 4 to play. Sam Stone travels across Russia on the trail of the traitor General Brand, who stays one step ahead of him all the way to Tunguska.
The campaign spans five large levels, from Arctic coastlines and forests to abandoned villages and a ghost town. Expect the series' trademark arena fights against Mental's Horde, now joined by new enemies and bosses. The arsenal adds weapons such as the AK and the experimental Perun crossbow, along with new gadgets and vehicles. Side missions with new characters and hidden secrets reward exploration.
Online co-op, Steam Workshop support and a level editor give it plenty of replay value for fans of fast, old-school shooters. A Serious Sam: Siberian Mayhem Steam key is the cheapest way in. Croteam fans can also look at the studio's puzzle game The Talos Principle. Visit the official Serious Sam website for series news.
Standalone Chapter: Play the full campaign without owning Serious Sam 4.
Five Huge Siberian Levels: Fight across Arctic coastlines, desolate forests, abandoned villages and a ghost town.
New Weapons and Vehicles: Use the AK, the experimental Perun crossbow and new gadgets and vehicles alongside series classics.
New Enemies and Bosses: Fresh creatures and boss fights join Mental's Horde.
Side Missions: Meet new characters and complete optional quests that add story and rewards.
Online Co-op: Team up with friends to clear the campaign together.
Workshop and Level Editor: Download community content through Steam Workshop or build your own maps with the included editor.
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