The Dirt Bike physics motocross series, from the original to Dirt Bike 2.
FOG's third physics motocross game: reach the end of every level as quickly as you can, and try not to flip over.
The fourth physics motocross game: take it to the rooftops and finish every level in the shortest time.
The fifth and last physics motocross game: clear the courses over tyres, barrels and ramps, and land as many tricks as you can.