Extreme G2 is probably the second fastest racing game for the N64 after F-Zero. I personally like the game play of the first part way more, however the possibility of precise steering, the fact, that simply driving a turn without touching the wall speeds significantly up and breaking the sound barrier make it an interesting candidate for a tas.
Optimising this game is very difficult (like most racing games), so I'm only doing a test tas of the small GP (4 tracks) for the few people who actually played this game, players who motivates this movie to make an actual tas and mostly to occupy my mind.
In hindsight, I should not have picked the bike with the best max speed (worst acceleration), as deceleration can't be avoided at ramps and points with a high change of acclivity. But maybe the next tracks will be better,
I'll post the movie file, when it is finished. (rerecords something around 2-3000)
edited youtubevideo of the first track
