Hmmm, my first gamebook was the french version of a german game (L'Oeil Noir, I don't remember the German name), which was very similar to Basic D&D. I think I was 12-14 years old, so that would make it 1987-1989. Maybe a year later, my brother brough OD&D, then AD&D 1st Edition home.
Aaah, I...