DOOM is a video game series by John Carmack, John Romero, Adrian Carmack, Kevin Cloud, and Tom Hall. It is considered a top of First-Person-Shooter gaming. Over 10 million copies have been sold since its debut in 1993 as of now. After its success, numerous sequels have been released. The plot of this game series is to fight the demons and undead. Also, we've created an interesting jigsaw puzzle related to it.