The Wolfenstein 3D DEBUG MODE does lots of neat things, and
probably some I have yet to discover.

1. Run Wolfenstein 3D by typing:  WOLF3D -next

2. While playing, press [TAB] [CTRL] [ENTER] at the same time.
   You should see "Debugging Keys Available".

DEBUG MODE keys:

[TAB]-E    Jumps ahead two (2) levels

[TAB]-G    Toggles "God" mode on/off (invincibility)

[TAB]-I    Gives you "free Items"--Health, Ammo, and Weapons

[TAB]-N    "No clipping" lets you walk thru walls! FUN!

[TAB]-W    Warps to any level (1-10)

[TAB]-O    Show "Overhead" view of current level.

There are more, but they aren't as interesting as the ones above.

HAVE FUN!