Supercars-mode: In personal options, enter name:
"Supercars", and team: "Grem". 
The camera will now show the races from above.

Mega-springs-mode: In personal options, enter name: "Demon", and team: "Grem".
Your car will be equipped with very bouncy suspension  

LA-style suspension: In personal options, enter name: "g-ride", and 
team: "west". Play that funky music, and off you go! 

Moon gravity: In personal options, enter name: "Buzz Aldrin", and 
team: "NASA".A small step for a man, a huge jump by your car.

Ignition-mode: In personal options, enter name: "Ignition", and team: "UDS".
Not quite the same, but fun indeed.  
Avenger: (Hardware acceleration only) In personal options, enter 
name: "Avenger", and team: "Zx". The map will be replaced with the Avenger
sprite (from the ZX-Spectrum game).  

Water Mode: (Hardware acceleration only) In personal options, enter 
name: "Ramlosa", and team: "H20".  

All Cars & Tracks: In personal options, enter name: "R Peterson", and team: "Swe". 

Hell Mode: (Hardware acceleration only) In personal options, enter 
name: "Lemmy", and team: "Ace".  

TRON-mode: (Glide only): In personal options, enter name: "tribute to tron".
All geometry will now be rendered with hidden-line vector graphics.