http://www.remedygames.com/games/death_rally.html
They just released this recently as Freeware.
Link to the Apogee / 3dRealms web site showing the original release date:
http://www.3drealms.com/rally/
\"September 6, 1996\"
Link to the PDF regarding the Technical Manual:
http://www.3drealms.com/tech/manuals/Death%20Rally.pdf
Page 25 of 28 shows the \"Cheat Codes\" if anyone is interested.
The music tracks are still very cool after all this time.
Enjoy!
