Load the game with:

"tv -turbo" (Will increase the speed in a 50%)
"tv -hyper" (will increase the speed in a 100%)

Cheat:

TRIGODS - Invicibility
TRISHLD - Restores shields to full
TRINEXT - Ends current level
TRIHOVR - Game responds with Hover Pad.
MANIACS - Afterburner (gives you 960 afterburner units)
TRSCOPE - Displays an oscilliscope
TRIBURN - Terminal Velocity
TRFRAME - Displays a frame counter
TRIFIRx - where x is a number between 0 and 9

0 - Invicibility
1 - P.A.C.
2 - I.O.N.
3 - R.T.L.
4 - M.A.M.
5 - S.A.D.
6 - S.W.T.
7 - D.A.M.
8 - Afterburner
9 - Invisibility

3DREALM - Game replys with Smokin'. This is a catch-all type cheat. It combines the MANIACS cheat with all the weapons.