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Revision as of 13:57, 9 April 2013 by Than (talk | contribs) (Cthon -> Chthon (corrected spelling))
Health N/A
Gib threshold {{{gibthresh}}}
Attacks Lava bomb
Drop nothing
1st appearance e1m7
Game version Shareware
Death message None (Player died)
† The data files for monsters that appear only in the registered version of Quake reside in pak1.pak rather than pak0.pak.

Chthon is the end boss of the first episode, Dimension of the Doomed. You can find him in The House of Chthon, which is preceded by The Door to Chthon. He resides in a pool of lava, emerging once you pick up the episode's rune. He attacks by hurling explosive lava bombs (which, on Hard difficulty, are aimed ahead of moving targets). The lava bombs do the same amount of damage as a player's rocket (which is at least 100 upon a direct hit).

He is immune to player based weapons (via self.takedamage = DAMAGE_NO;), and can be damaged only by electrical prongs residing in the ceiling of his house, the code for which can be found in boss.qc. Switches are located near both of the prongs, and at the center-end of the level is a switch to activate them, electrocuting Chthon. On Easy skill you only need to do this once, but otherwise it will take three jolts. Upon death he sinks back into the lava, and a bridge forms over the sulfurous mass allowing you access to an exit from the arena.

"As the corpse of the monstrous entity Chthon sinks back into the lava whence it rose, you grip the Rune of Earth Magic tightly. Now that you have conquered the Dimension of the Doomed, realm of Earth Magic, you are ready to complete your task."


Chthon cannot be killed by regular weapons and must be killed by the lightning trap in e1m7 - the level in which he appears. To use the trap, the player must first press the buttons on the top level of the arena to lower the lightning rods, then press the button in the centre to fire lightning at Chthon. On Easy skill, a single hit is enough to kill Chthon, but on all other skill levels, three hits are required, which requires repeating the entire sequence of button presses for each subsequent attack.

Chthon's attacks are very easy to avoid on Easy and Normal skill, as he throws lava bombs directly at the player, so as long as the player keeps moving, he is unlikely to be hit. Onb Hard and Nightmare skill, however, the bombs are thrown in front of the player, so running without being careful is likely to end in the player's death. To successfully avoid the lava bombs on higher skill levels requires much more care.

Entity type point
Entity class monster
Dimensions 256 x 256 x 280
Quake-C boss.qc
Precaches progs/boss.mdl


Entity information

monster_boss is the entity for placing Chthon in a level.




targetname The targetname of Chthon. When triggered, Chthon will wake up if inactive.
target The targetname of the entity to be triggered when Chthon dies.
killtarget The targetname of the entity to be removed when Chthon dies.


monster_boss does not support the ambush spawnflag that is supported by regular monsters. Instead, it must be triggered for Chthon to appear at all.

It does, however, support the standard spawnflags for difficulty and deathmatch presence.

Flag Common Name Description
256 Not on Easy Chthon will not spawn on Easy difficulty.
512 Not on Normal Chthon will not spawn on Normal difficulty.
1024 Not on Hard Chthon will not spawn on Hard difficulty.
2048 Not in Deathmatch Chthon will not spawn in Deathmatch mode.


FGD Definition

This is the format used by TrenchBroom and Worldcraft. Note that the model(...) parameter is not supported by Worldcraft. This does not include the Monster base class definition, which is also required.

@PointClass base(Monster) size(-16 -16 -24, 16 16 40) model(":progs/boss.mdl")
    = monster_boss : "Chthon" []

DEF Definition

This is the definition format used for most old Quake editors, including the original QuakeEd.

/*QUAKED monster_boss (1 0 0) (-128 -128 -24) (128 128 256)