Doom was released by id Software in 1993, and it cleverly combined hugely innovative gameplay features with a storyline crammed with controversial satanic imagery… so its success was assured. Playing the part of a lone soldier up against the hordes of Hell, the player had to navigate his way through the maze-like levels, blasting the enemies with a range of destructive weapons. Multiplayer mode and the ability to design your own level mods gave the game longevity. It laid the foundations on which gaming’s most popular genre would be built.