Serious Sam: Siberian Mayhem is a standalone expansion for the dynamic first-person shooter Serious Sam 4, which will send the main character to Siberia. According to the plot, Sam is trying to catch up with the traitor General Brand, but he is always one step ahead. On five new levels, you will visit arctic shores, desolate forests, abandoned villages, and a creepy ghost town. Along with new enemies and bosses, you will encounter new types of weapons to annihilate them.