O

Printable ASCII characters
~	!	@	#	$	%	^	&	*	(	)	_	+	space
`	1	2	3	4	5	6	7	8	9	0	-	=	{	}	|
	Qq	Ww	Ee	Rr	Tt	Yy	Uu	Ii	Oo	Pp	:	"	[	]	\
	Aa	Ss	Dd	Ff	Gg	Hh	Jj	Kk	Ll	?	;	'	Ctrl
	Zz	Xx	Cc	Vv	Bb	Nn	Mm	,	.	/	<	>	Alt

In NetHack, the letter O serves the following purposes:

• o represents an orc:
  • o goblin
  • o hobgoblin
  • o orc
  • o hill orc
  • o Mordor orc
  • o Uruk-hai
  • o orc shaman
  • o orc-captain

• O represents an ogre:
  • O ogre
  • O ogre lord
  • O ogre king

• Press shift + o to set game options.
• Press o open a door.

Historical uses

In hack121, orcs used the o glyph as in modern NetHack, while oxidizers used the O glyph; in Hack for PDP-11, and from Hack 1.0 to NetHack 2.3e, orcs instead used the O glyph, while owlbears used the o glyph. In NetHack 3.0.0, the ogres were introduced and given the O glyph, while the various new and returning orcs were moved to the o glyph; owlbears were moved to ​H giant humanoids, then subsequently reclassified as ​Y apelike creatures.

Variants

SLASH'EM

SLASH'EM introduces new creatures that use the o and O glyphs:

• o orc:
  • o war orc
  • o great orc
  • o Grund the Orc King
  • o snow orc
  • o demon orc
• O ogre:
  • O ogre mage
  • O shadow ogre

UnNetHack

UnNetHack introduces a new monster that uses the o glyph:

• o deep orc

dNetHack

dNetHack introduces several new monsters that use the o and O glyphs:

• o orc:
  • o Uruk-captain
  • o Mordor orc elite
  • o Mordor shaman
  • o Mordor marshal
  • o Angband orc
  • o orc of the ages of stars
  • o orc warchief
  • o Bolg
  • o high shaman
  • o orc warrior
• O ogre:
  • O ogre mage
  • O ogre emperor
  • O siege ogre