Hi
I combined an experimental driving game concept test .blend & .exe files for the public testing/fun.
No sounds at this version, since I'm not familiar with the Blender Game Engine sound setup/settings.
Game play
The player start's above green home platform, next of the giant green home pylon marker. Once the player drop down to the ground level, the timing clock starts ticking.
The player need to find & drive to in free order the preset ORANGE, RED, WHITE, BLUE and YELLOW Turn-Point(TP) pylons and collide with them. The TP-pylons will disappear after successful check/collision.

Once all TP-pylons are checked, the player need to drive back to the green home platform, at giant green home pylon, which will stop the timing clock.
Driving style and penalties
The roll-overs and turn help requests (a- & d-keys) are causing a time penalties.
The player can see the result in console window.
Difficult levels (only in Blender 3D)
The player can move the TP-pylons more apart and difficult places. Also the player can adjust the terrain roughness with Terrain-object Z-axis scaling, to get more challenge.
The Terrain-object Z-axis scaling value 500 and above will give a real challenge for the route planning and driving style. The low gear(q-key) will be your friend.
The game controls
Mouse = Views & vehicle steering
W-key = Drive forward
S-key = Drive backwards
Q-key = Low/High gear toggle
A/D-keys = Turn help request. Only at zero speed, when upside down.
THE CREDITS
The vehicle physics, vehicle model, cotrols setup by Raiderium:
http://blenderartists.org/forum/showthread.php?t=170926 The terrain is based to the brontosaurus method:
http://blenderartists.org/forum/showthread.php?t=144749 The sky dome is made by the Nikolay740:
http://blenderartists.org/forum/showthread.php?t=142922 The game idea, game play setup & minor adjusts by Xjazz
The zipped .exe file with needed .dll's download
http://fdm4bge.1g.fi/Files/10001/ATV_driver_a01e/ATV_driver_a01e.zipUnzip the file to given folder.
Start the game with ATV_driver_a01e.exe.
The zipped sourse .blend file download (requires a blender 2.49+ installation)
http://fdm4bge.1g.fi/Files/10001/ATV_driver_a01e/ATV_driver_a01e_blend.zipHappy jumps and safe landings
BR
Xjazz