Damage types

The Damage Type property of a trigger_hurt entity lets you choose between many types of damage, but it may be hard to figure out what these types of damage do exactly, so below is a list (for Half-Life 2).

If nothing else is stated, each damage hit will (besides damaging you) make you jerk a little, make your screen flash red if you don't have a HEV suit, or provide red HUD directions to display where the damage is coming from if you have a HEV suit.

The damage caused depends on the current difficulty setting:

• The "Easy" (skill 1) setting causes 25% of the Damage value every half-second.
• The "Normal" (skill 2) setting causes 50% of the Damage value every half-second.
• The "Hard" (skill 3) setting causes 75% of the Damage value every half-second.
• : Always causes 100% of the Damage value every half-second.

The value for damage types are essentially bitflags. This means that multiple damage types can be specified at once where applicable. For instance, DMG_SHOCK have a value of 256 and DMG_DROWN have a value of 16384. Entering the sum of those (256 + 16384), 16640, would both cause the player's screen to flash blue, and a spark will appear near the player.

Damage type list

This is a list of every damage type available in the default FGDs.

Generic

• Nothing special.
• Damagetype: Value 0

Crush

• The whole screen flashes red even if you're wearing a HEV suit.
• Always does 50% of the Damage value every half-second, regardless of difficulty setting.
• Damagetype: Value 1

Bullet

• Plays bullet impact sounds.
• Damagetype: Value 2

Slash

• Displays spurts of blood if player HEV suit power is 0.
• Damagetype: Value 4

Burn

• Plays heat damage sounds. (Something sizzling and the player going "Ouch!".)
• The whole screen flashes red even if you're wearing a HEV suit.
• No HUD damage directions are given.
• (For additional indication, you can add an ambient_generic playing hl1/fvox/heat_damage.wav to make the HEV suit go: "Extreme heat damage detected.")

Does NOT ignite players.

• Damagetype: Value 8

Freeze

• Nothing special.
• A player killed by this type of damage will be displayed as being run over by a train.
• When used in the Half-Life codebase, the HEV suit will display a snowflake icon on the left side of the screen.
• Damagetype: Value 16

Fall

• Always does 50% of the Damage value every half-second, regardless of difficulty setting.
• The HEV suit will not protect you from this type of damage.
• A player killed by this type of damage will display the fall-specific kill feed line "fell to a clumsy, painful death".
• Damagetype: Value 32

Blast

• Nothing special; may temporarily deafen the player.
• A player killed by this type of damage will leave gibs instead of a ragdoll.
• Damagetype: Value 64

Club

• Nothing special.
• A player killed by this type of damage will emit their dramatic death sounds (Team Fortress 2's melee weapons deal this type of damage).
• Damagetype: Value 128

Shock

• Sparks for every hit.
• (For additional indication, you can add an ambient_generic playing hl1/fvox/shock_damage.wav to make the HEV suit go: "Electrical damage detected.")
• Damagetype: Value 256

Sonic

• Plays damage sounds.
• Damagetype: Value 512

Energy beam

• Nothing special.
• Damagetype: Value 1024

Drown

• The whole screen flashes blue even if you're wearing a HEV suit.
• Double HUD damage directions are given.
• Plays drowning sounds.
• Always does 50% of the Damage value every half-second, regardless of difficulty setting.
• The HEV suit will not protect you from this type of damage.
• Damagetype: Value 16384

Paralyze

• HEV suit warning: "Warning: Bloodtoxin levels detected." (hl1/fvox/blood_toxins.wav)
• Damagetype: Value 32768

Nerve gas

• HEV suit warning: "Warning: Biohazard detected." (hl1/fvox/biohazard_detected.wav)
• A player killed by this type of damage will be displayed as a kill by a sawblade.
• Damagetype: Value 65536

Poison

The type of damage a poison headcrab inflicts.

• The whole screen flashes yellow even if you're wearing a HEV suit. (This flash seems to stick sometimes, and may appear the next time the player is hurt.)
• The HEV suit will not protect you from this type of damage.
• Always does 50% of the Damage value every half-second, regardless of difficulty setting.
• HEV suit warns: "Warning: Bloodtoxin levels detected." (hl1/fvox/blood_toxins.wav)
• HUD displays: "Neurotoxin Detected Administering Antidote"
• The damage received is healed after awhile (even if the player is not wearing a suit, oddly enough).
• Similar to GENERIC.
• Damagetype: Value 131072

Radiation

• Close proximity to a trigger_hurt with this type of damage will set off the HEV suits Geiger counter.
• The HEV suit will not protect you from this type of damage.
• The whole screen flashes white even if you're wearing a HEV suit.
  • The screen does not flash.
• Double HUD damage directions are given.
• HEV suit warning: "Warning: Hazardous radiation levels detected." (hl1/fvox/radiation_detected.wav)
• Damagetype: Value 262144

Drown recover

• Nothing special.
• Damagetype: Value 524288

Chemical

• The whole screen flashes white even if you're wearing a HEV suit. (This flash seems to stick sometimes, and may appear the next time the player is hurt.)
• Double HUD damage directions are given.
• HEV suit warning: "Warning: Hazardous chemical detected." (hl1/fvox/chemical_detected.wav)
• Critical damage. Deals 200% of the Damage value.
• Damagetype: Value 1048576

Slow burn

• Nothing special.
• Damagetype: Value 2097152

Slow freeze

• Nothing special. This bit is set when attempting to use an env_entity_dissolver on a live player.
• Damagetype: Value 4194304

Damage type table

This table shows every damage type available in the game. Some of these are not in the default FGDs and have to be added manually.

Name	Value	Info
DMG_GENERIC	0	Generic damage
DMG_CRUSH	1	Damage from props
DMG_BULLET	2	Damage from bullets.
DMG_SLASH	4	Damage from most melee attacks (that scratch, lacerate, or cut).
DMG_BURN	8	Burn damage (e.g. Igniting something and noclipping in it).
DMG_VEHICLE	16	Hit by a vehicle.
DMG_FALL	32	Damage from high falls. (can be used to disable player fall damage)
DMG_BLAST	64	Damage from explosives (ear-ringing effect).
DMG_CLUB	128	Damage from some enemy melee attacks (blunt or unarmed) e.g. Combine melee attack.
DMG_SHOCK	256	Damage from electricity (creates sparks and puff of smoke at damage position).
DMG_SONIC	512	Damage from supersonic objects (unused).
DMG_ENERGYBEAM	1024	Laser or other high energy beam
DMG_PREVENT_PHYSICS_FORCE !FGD	2048	Prevent a physics force (e.g. Gravity Gun Jump on Props)
DMG_NEVERGIB !FGD	4096	No damage type will be able to gib victims upon death
DMG_ALWAYSGIB !FGD	8192	Any damage type can be made to gib victims upon death
DMG_DROWN	16384	Damage from drowning
DMG_PARALYZE	32768	Damage from paralyzing
DMG_NERVEGAS	65536	Damage from nervegas. (GLaDOS's gas from the ending of Portal)
DMG_POISON	131072	Damage from poison (e.g. black head crabs)
DMG_RADIATION	262144	Damage from radiation (Geiger counter will also go off).
DMG_DROWNRECOVER	524288	Drowning recovery (health regained after surfacing)
DMG_ACID	1048576	Damage from dangerous acids. (gives a light-cyan flash ingame)
DMG_SLOWBURN	2097152	In an oven slow burning
DMG_REMOVENORAGDOLL !FGD	4194304	No ragdoll will be created, and the target will be quietly removed.
DMG_PHYSGUN !FGD	8388608	Damage from the Gravity Gun (e.g. pushing head crabs).
DMG_PLASMA !FGD	16777216	Turns the player's screen dark and plays sounds until the player's next footstep.
DMG_AIRBOAT !FGD	33554432	Damage from airboat gun.
DMG_DISSOLVE !FGD	67108864	Damage from combine technology e.g. combine balls and the core.
DMG_BLAST_SURFACE !FGD	134217728	A blast on the surface of water that cannot harm things underwater
DMG_DIRECT !FGD	268435456	Damage from being on fire.(DMG_BURN relates to external sources hurting you)
DMG_BUCKSHOT !FGD	536870912	Damage from shotguns. (not quite a bullet. Little, rounder, different.)

Prefabs

• Example 1 - Gravity Gun Jump Without Taking Damage!
• Example 2 - No Player Fall Damage!

See also

• Filter_damage_type