With how the stadium and difficulty slowly increasing works I managed to beat inferno and all the other extremes some with gold! In older trials games I just quit when I got to extremes but now I can do them thanks to the game and tutorials! In trials HD I got to the hard tracks but I was only able to do a few and I thought I will never be able to do extreme or hard tracks! (Becuase at the time I was 5 and trials HD hard tracks are super hard.) So thanks trials!