It had to be sometime in 90, since Bonk 1 was out, but I got my TG in February of 91'. I think it was either Bonk or KC, possibly Blazing Lazers. It was at a friends house, I was staying overnight & we were going to Disneyland the next morning. I played Bonk almost all the way thru, I remember being flippin' tired & trying to get myself up that vertical area in level 5 with the blocks that open up right after you land on them, I eventually gave up
I know he also had Bloody Wolf, but, someone was borrowing that. So, yeah, it had to be either BL, KC, or Bonk. Man, playing the Turbo when it was new....that is such a freakin' great memory! Man, it's wierd, but I can smell that new(ish) Turbo, those were the days!