Here, I'll start. When I was 8 years old, my parents went to a dinner party and plonked me down in front of the host's computer so I'd stay out of their way. The game they booted up to keep me occupied was Space Quest II. Little did they know what impact that would have on me...
Those old Infocom games basically taught me how to type. All the Zorks, Hitchhikers, and there was a Lovecraftian one maybe called Lurking Horror.