Sanctum is a unique combination of Tower Defense strategy with fast-paced FPS action. Take on the role of an elite soldier tasked with defending a futuristic world from invaders. Build towers, plan mazes and... Stand up for the fight yourself when the real carnage begins. This innovative approach to the genre makes every Sanctum playthrough full of tension, tactical thinking, and adrenaline. You can play solo or in co-op with up to three other players, forming an unstoppable team of defenders. Key features: A combination of FPS and Tower Defense in one game The ability to build mazes from towers, not just static lines of defense Extensive gamestyle customization system 4-player co-op 87 achievements to unlock Hidden secrets and easter eggs for inquisitive players Sanctum is a fresh take on tower defense – here you not only build, but also fight.