Roadsters 98 is a prototype racing game by Genetic Fantasia, with a gameplay similar to Micro Machines, that seems to have been cancelled in early development. A playable demo exists, thanks to a scene leaked ROM from the old GameBoy Color days. While there is a game called Roadsters released in Europe and USA in 2000, it is completely different from Roadster 98. The release group got access to some beta software which is normal but in this case they probably thought they’d do a nice pre-store but the final game never appeared – unless this is an insanely rare special release no one knows about.
We can speculate that Genetic Fantasia worked on Roadsters GameBoy Color for Titus, but something went wrong and the publisher decided to release a different game.
Thanks a lot to BigFred for the contribution!