I don't remember what the very first one was. I very vaguely remember a game about knights jousting that was played with a joystick. I may have been too young to play, but I remember watching my dad. I know there were a number of flight simulator games I used to play with my dad, and some side scrollers including Abuse, Commander Keen, and Duke Nukem 1. These were all PC titles of course. Later on, I remember Doom and Quake, Command & Conquer, and of course Warcraft, Starcraft, and Diablo. It was the Blizzard games that really hooked me - I've been playing Starcraft since I first tried it at age 7.