Top Five Hardest Game Ever

Below is a list of the ten hardest games I've played, until now I had never finish this game, let's see :1.Pac-man (NES)Pacman picThe round yellow ball-eating is frustrating me, more and go up to the next level then the motion will be getting faster and faster to make my thumb was swollen, no one knows the ending of this game?2.TMNT III The Manhattan Project (NES)I really liked the TMNT games