The Spear Of Destiny:

Debug sequence: SPEAR -debugmode

Once into a game hit (LEFT SHIFT/ALT/BACKSPACE).
Then hold TAB while hitting one of the following keys:


B - Border Color
C - Number of Enemies/Walls currently active
E - End current floor
F - Current Coordinates
G - God mode (No Damage)
H - Take a hit
I - Free Items (Health, Ammo, Gun, Points)
M - Memory Usage
N - No Clipping (Walk through walls)
P - Pause Game
Q - Quit to DOS (Instant)
S - Slow Motion
T - Show walls in memory
V - Add VBL's (No idea but slows game play down)
W - Warp to any level
X - Extra Stuff (???)
(CTRL) - Shoot in slow motion
(SPACE) - Open door slowly


These are all I could find.  Enjoy and let's hope for more from Apogee....