Doom's single-player campaign lasts 13 hours or more, according to developer Id Software.
Responding to a fan on Twitter, the studio's official Doom account said that Id staff "average 13+ hours in the campaign."
.@Unreal389 The difficulty level plays a factor, but folks playing at the office average 13+ hours in the campaign— DOOM (@DOOM) February 11, 2016
Though gamers' mileage will likely vary, a campaign that lengthy is a change from the brief or non-existent campaigns in today's prominent shooters.
The game also offers several multiplayer modes, and a map editor with which users can create theoretically infinite multi- and single-player content.
Doom launches May 13th on new-gen consoles and PC.