7E3CCDCD6D3972BDF92080F35E50AF51533D334A (WOLF3D.EXE; 1.4g, After LZ91 decompression),
67D14783EFAAA70CF158D78C83E7A7F3F8ED964A (WOLF3D.EXE; Source code release)
Wolfenstein 3D had its source code released in 1995,
which also includes a DOS executable of the game
with debug info intact. Apogee never released a version
with debug info prior to this.
With Version 1.0, use the -next command line argument.
Then, during gameplay, press Control, Tab, and Enter together.
With Version 1.1 or 1.4g, use the -goobers command line
argument. Then, during gameplay, press Left Shift, Alt, and Backspace together.