20 Most Terrifying Video Games Of All Time

11. I Have No Mouth And I Must Scream

Starting with the rather dark premise that there are only five human beings left alive after an AI wipes out civilisation, IHNMAIMS tasks you with playing out a metaphorical adventure with each survivor in an attempt to 'redeem' the human race.

Adult themes including rape, genocide and paranoia make this an emotionally draining nightmare.