The following cheats are available by typing in the given codes, one character at a time:
trigods = Invincibility toggle.
trishld = Restore shields.
trinext = Skip to the next level.
trihovr = Hover in place.
trifir8 = Afterburner.
maniacs = Afterburner.
triburn = Fast afterburner.
trscope = Toggles music oscilloscope.
trframe = Count frames per second.
trwarpX = (where X is a level #) Warp to level X of current episode.
3drealm = "Smokin'"; power up everything.
trifir9 = Thirty seconds of invisibility.
trifir0 = Thirty seconds of invincibility.
trifir1 = PAC ammo.
trifir2 = ION ammo.
trifir3 = RTL ammo.
trifir4 = MAM ammo.
tifir5 = SAD ammo (registered version only).
trifir6 = SWT ammo (registered version only).
trifir7 = DAM ammo (registered version only).

Each of the following must be invoked from the main menu. If they don't work on their own, try holding [ctrl] down before pressing the desired letter.

Z = Display benchmark statistics for your computer.
M = Play a MOD file.
B = Play a TVI animation file.
S = Sound debug mode.
R = Record a demo.
P = Play a demo.

Behind every good fighter pilot is a good call sign. Use this link to generate a Callsign when creating a Character.
http://www.topgunday.com/call-sign-generator/

https://www.youtube.com/watch?feature=player_embedded&v=ck23fEijbDU
Developed: Terminal Reality
Published: 1995 3D Realms/Apogee Software
Genre: 1-8 Player Flight-Based FPS

A few months after Terminal Velocity came out, Fury3 came out for Windows 95 as a Semi-Launch Title.