Serious Sam: Siberian Mayhem
51 Achievements
GOG
The Refinery
Back on the Big Land Details for this achievement will be revealed once unlocked
45.1%
How to unlock the The Refinery achievement in Serious Sam: Siberian Mayhem - Definitive Guide
The Last Rascal
TrueAchievements
TrueAchievements
UNMISSABLE, STORY RELATED
DIFFICULTY: Any
CO-OP: Unlocks, all players
Complete Mission 1: A Smell of Petroleum Prevails
DIFFICULTY: Any
CO-OP: Unlocks, all players
Complete Mission 1: A Smell of Petroleum Prevails