You’ve come here for a reason. The Union Aerospace Corporation’s massive research facility on Mars is overwhelmed by fierce and powerful demons, and only one person stands between their world and ours. As the lone Doom Marine, you’ve been activated to do one thing -- kill them all. The legacy lives on with the fourth installment of the popular FPS game from id Software. This next-generation Doom features single-player and multiplayer modes, as well as an advanced SnapMap stage design feature for fast and comprehensive stage creation that can be quickly shared online with other Doom. Twitter -.