Super Mario Bros (NES), Pokemon Red (GBC), Super Smash Bros. (N64), and Halo: Combat Evolved (Xbox) all played a major role in getting me into gaming.
Super Mario Bros first got me interested in gaming when I was really young, maybe 4 or 5. I then graduated to SNES and Super Mario World. My friends in the late nineties got hooked into the Pokemon craze and Pokemon Red was the first game that I really spent a lot of time with. From there, Super Smash Bros and Halo made me the competitive jerk that I am to this day.