Titan

H titan
Difficulty	20
Attacks	Physical 2d8 spell-casting

H titan
Difficulty	20
Attacks	Physical 2d8 spell-casting
Base level	16
Base experience	537
Speed	18
Base AC	-3
Base MR	70
Alignment	9 (lawful)
Frequency (by normal means)	Very rare
Genocidable	No
Weight	2300
Nutritional value	900
Size	Huge
Resistances	None
Resistances conveyed	None
A titan: can fly. has a head, a couple of arms, and a torso. is omnivorous. is nasty. is strong. can throw boulders. can pick up weapons and food. can pick up magical items. has infravision. can be seen through infravision.
Reference	monst.c#line1556

The titan is a monster in NetHack. It is infamous for its guaranteed appearance on one of two variants of Medusa's level and can be difficult for a player at that stage of the game to defeat due to its tendency to summon large swarms of monsters. They are also one of two significant obstacles on the average dig for victory (the other being minotaurs).

The titan which appears on the Medusa level is generated lawful most of the time, causing no trouble for lawful characters since it's peaceful to you. Other titans may not be so forgiving.

Strategy

The greatest threat titans pose is the ability to summon monster swarms so be prepared for any monster to spawn. Note that titans cannot be genocided, so don't even try it if you're in trouble. However, they can be tamed and respect Elbereth, which might be a life-saver.

Encyclopedia entry

Gaea, mother earth, arose from the Chaos and gave birth to
Uranus, heaven, who became her consort.  Uranus hated all
their children, because he feared they might challenge his
own authority.  Those children, the Titans, the Gigantes,
and the Cyclops, were banished to the nether world.  Their
enraged mother eventually released the youngest titan,
Chronos (time), and encouraged him to castrate his father and
rule in his place.  Later, he too was challenged by his own
son, Zeus, and he and his fellow titans were ousted from
Mount Olympus.
        [ Greek Mythology, by Richard Patrick ]