It was MegaRace.

( Ttssattsr, Thu 9 Jul 2009, 2:45, archived)

This is possible.
I also had a platform game. The first level was set in a cave. I'm pretty sure the second level was in some kind of Jamaican setting. What was the name of the game?
( JessAction Give me all your expensive brandy and hubcaps., Thu 9 Jul 2009, 2:50, archived)

The Smurfs.
I never had a MegaCD, cunt.
( Ttssattsr, Thu 9 Jul 2009, 2:54, archived)

For 15 years, this game has been at the back of my mind.
One day I'll find out more information about it.
( JessAction Give me all your expensive brandy and hubcaps., Thu 9 Jul 2009, 2:57, archived)

There's a list of MegaCD titles on wikipedia, if that helps your cause.
Just don't play it again when you find out. It'll be shit.
( Ttssattsr, Thu 9 Jul 2009, 2:58, archived)

The racing game was for the MegaCD.
The plaform game was just for the Mega Drive.
( JessAction Give me all your expensive brandy and hubcaps., Thu 9 Jul 2009, 3:08, archived)

Quake

( Gilgamesh gazed in wonder as Frampton came alive, Thu 9 Jul 2009, 3:00, archived)