Serious Sam: Siberian Mayhem is a stand-alone expansion for the Serious Sam franchise developed by Croteam and Timelock Studio it features the classic FPS gameplay the series is known for but now you take the fight against the Mental army towards the wildlands of Russia, explore the vast Russian countryside full of forgotten stories, sceneries, unexplored places, and Sam’s trademark guns and blazes battle. All in the name to catch the notorious general brand who has always been one step ahead of Sam at every turn, the road is long and hard, and there is still so much you have yet to see.  

• The heart of Russia is large, cold, and unpredictable and even the alien invaders themselves feel lost whenever they try to penetrate this beautiful and dangerous land. Travel through 5 levels of arctic coastlines, desolate forests, abandoned villages, and large ghost towns.
• Mental has sent their best men to brave the Siberian wastes, a new set of dangerous foes and bosses for you to face, they are one of the most advanced and intimidating creatures Sam has met yet, only the strongest survive in this environment after all.
• Guns are your only defense against the cosmic beasts that hunt you, build a deadly arsenal of weapons the classic legendary AK, the newer age ‘Perun’ crossbow, Rain down death from above by using 50 tons of first-class firepower, and many more gadgets and vehicles.
• Sam will not be completely alone on this journey he will be helped by a colorful cast of outcasts and unexpected characters; they will help you if you do side-quests and uncover new chronicles for you to hear.