I went through the N64 years ago. There are only a couple N64 titles that truly used the D-pad for directional. Rampage, a few puzzles like Tetris and Dr. Mario, game show games like jeopardy or that south park one, and a couple fighters like mortal kombat and fighters destiny. That being said, there were a lot more games that you could substitute 8-way on the controls with no loss. For example, Worms Armageddon, a port of a very non-analog game, will not allow use of the d-pad for directional, but the controls are set to the analog stick only. Even a number of 3D games analog were fine because the analog was not developed as a finesse of the game. We are talking 3D gaming at an early stage.