For me it would be the Original Super mario Trilogy on the NES, so many our of fustration rage and glory when i finally pass bowsers castle in SMB 1 conquering that frog bastard in SMB2 and Defeating for the first time bowser in SMB3 whit 0 lifes and no power ups left o what glorious day that was, btw i was 7 years old when i did that never played video games again till i turn 15, a friend show me Starcraft and it was then i got back in to gaming till this day.