The game I remember was on the PS1. It was a racing game in the vein of wipeout, but instead of courses it had more open areas that you could race around and explore. The vehicles levitated. The vehicles went at insane speeds. The main level I remember was a green, hilly area, with a rainy sky and grey ground with dark rock structures plotted along the sides. The game wasnt amazing, but its something I really need to know. The best thing I remember about it was me and my brother driving up the walls which you weren't supposed to be able to do.