Barrage

Go to your Barrage directory and RIGHT click on the sound.bat file.
Then when the menu pops up click EDIT. Here is what mine said
initially...

rem set GV_ENV_MIPMAP_DITHER=1
set GV_ENV_SGL_VERTEX_POOLING=1
set GV_ENV_TRAP_FP=0

cd src
fly -p -snd -3dfx 111
cd ..

now it says...
cd src
fly -p -snd -vcrp -3dfx 111

Well after hacking around some of the files, I uncovered some
variables (switches) that unlock many cool things. I found that it's
best to enter the codes between the -snd and the -3dfx switches (not
sure why, but it works). Here they are and feel free to post them on
Voodoo Extreme's site...

The best one is the first one...

-vcrp
(a vcr mode WITH NO TIME LIMIT!!!, and you are also
INDESTRUCTIBLE!!!, and you can rewind, edit cut/paste, and watch your
battle!!! I love it!) I imagine this is how they made the demo for
the game when it's running and says "press any key to begin". This is
great!!!

-god
no damage

-sissy
no fighting, although this doesn't seem to work so far...

-wide
wide angle view

-cinema
cinemascope, reduced screen height for a "theatre" like feel

-center or -left or -right
for a three small windows view of the game

-ross
3 screens, identical views

-mmx or -intel or -animal or -jesler
change the "in demo" video on the blimp and billboards to various
"mini" commercials (I don't think the videos are included in the demo
though)

-scr1/4 or -scr1/16
change the size of the entire viewing window to 1/4 or 1/16 of your
viewing monitor

-?
for help listing

I really liked the demo and was frustrated because I kept dying so
fast, or the timer would expire. Now I can explore to my hearts
content with the -vcrp switch.