The FPS - or first-person shooter - is gaming's most popular genre, and with good reason. There aren't many better ways to spend a weekend pretending to be a highly trained badass, after all, and FPS games allow you to do it from the best view possible.
Over the years we've had some incredible experiences from this genre, so we've rounded up 20 of the best of all time.
And yes, obviously Doom's in there. It wouldn't be a 'best FPS list' without it.