5. I Have No Mouth and I Must Scream (PC/Mac, 1995)

If Saw and the Terminator series had unrepentant sexy time, you’d get this game based on Harlan Ellison’s short story of the same name. Set in a world where an evil computer named AM has decided to kill all of humanity save for five random people, I Have No Mouth and I Must Scream is a chilling experience that pits you, one of the surviving humans, against the cold and calculated machine as it forces you to jump through hoops to prove humanity's worthiness for existence. Pretty much a feel-good story, really.