NetHack -D	debug mode

Environment variables:

SHOPTYPE	mkroom.c  Zoo Throne-room Beehive ...
GENOCIDED	pcmain.c
HACKDIR 	pcmain.c
MAGIC		pcmain.c
INVENT		u_init.c
# USER
# LOGNAME
# PAGER
# HACKPAGER
# COMSPEC
# PATH
# NETHACKOPTS
# HOME
# SHELL
# TERM
# MAIL
# MAILREADER

