Terminal Velocity

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. (Information from Cheat Machine)