My son and I finally completed our first game we went through entirely together. A very special moment. We have been playing it a while, we finally completed Kingdom Hearts together with the secret ending. I actually beat the last boss, but he will try it soon since we have high attribute levels.

Do you remeber the first game you completed or saw the ending to?
I think mine was Super MArio Brothers. Most of the Atari games I played were the Activision type shooters without the ending, just go for the points and levels.