LOOSECANNON16   = Enable Cheats
CTRL-F10        = Enable Immortality
F10             = Get all weapons, max out energy, and get 
                  all items
F               = Display object framework
CTRL-V          = Memory stats, version #, and other misc. 
                  stuff
F7              = Display grid over level
ALT-F7          = Display a different grid over level
CTRL-F7         = Display yet another gred over level

Useful Command Line Parameters
-----------------------
-warp x (where x is a #) = Warp to level x
-skill x        = Change default skill level to x 
                  (useful when using -warp)

Useless Command Line Parameters
-------------------------------
-asylum         = Displays message "Enabling ENHANCED mode. (Not!)"
-demo           = Continuously loop intro

To get a refill on ammo just drop the weapon your using 
and pick it up again.