Berzerk

This is also known as "the killer game" for a reason. It was developed in the 80s, and wasn't only about shooting, but also caused the death of 2 players. The first one died in 1987: Jeff, 17 years old, had a heart attack after reaching 16,660 points! Peter, 18 years old, had another heart attack after breaking Jeff's record twice. As you may be able to tell by now, Berzerk is a really hard game: there are just too many ways to die -- electric walls, shooter robots, Evil Otto (who will be after you during the whole game)... This smiley face is actually the hardest video-game boss ever, and can kill you with a single touch! Do you dare?