I was born in 1989, and my username should make pretty clear what my favorite after-school game show was. I didn't have cable TV at my first house, so after PBS dropped "Where In Time..." in 1998, I was forced to make do with that year's revival of Match Game. I was fully aware that I was watching something that wasn't appropriate for a kid, and of course that just added to the fun.
That one only lasted a year, but by that point we had moved and the new house came with cable TV. I watched the last season or two of Figure It Out, then most of the run of Double Dare 2000. I was in middle school when that one ended, and it is probably the last kids game show I consider myself to have grown up watching.
I could give you a LOT of other memories of 1990s after-school TV, but those are the game shows. Most of the other kids game shows I grew up watching were on Saturday mornings.