I've basically registered to ask this question and to check that I'm not going completely daft.
OK, so Rocket league is this game that has just come out on PS4, it's basically an update of a PS3 game called Super Sonic Rocket Powered Acrobatic Battle Cars. Basically a game where you play football with cars and it's a lot of fun, but I am sure I had a game on the ST which was very similar.
It was in full 3D and it was reviewed in Games X in the early days, so it's possibly from 1991 or 1992.
Does anyone know what it was called?