View source for List of predefined response concepts

The following is a list of [[Response System|response]] concepts as defined in the SDK source.

{{tip|Custom response concepts can be added to NPC code or passed through each actor's <code>[[speakresponseconcept]]</code> input.}}

Concepts are defined in {{file|ai_playerally|h}} (the <code>TLK_</code> macros)

== List of predefined response concepts ==
{| class=standard-table
!Concept string !! Applies to !! Description
|-
|TLK_ANSWER           || || 
|-
|TLK_ANSWER_HELLO     || || 
|-
|TLK_QUESTION         || || 
|-
|TLK_IDLE             || || 
|-
|TLK_STARE            || ||
|-
|TLK_LOOK             || || 
|-
|TLK_USE              || player allies, {{ent|npc_vortigaunt}} || The player has done +USE on the NPC.
|-
|TLK_STARTFOLLOW      || {{ent|npc_citizen}} and simpletalkers || The NPC has begun following the player.
|-
|TLK_STOPFOLLOW       || {{ent|npc_citizen}} and simpletalkers || The NPC has begun following the player.
|-
|TLK_JOINPLAYER       ||{{ent|npc_citizen}} || 
|-
|TLK_STOP             || simpletalkers || 
|-
|TLK_NOSHOOT          || simpletalkers || The NPC has been damaged by the player, has a friend nearby, and is not dead yet.
|-
|TLK_HELLO            || ||
|-
|TLK_PHELLO           || || 
|-
|TLK_HELLO_NPC        || ||
|-
|TLK_PIDLE            || || 
|-
|TLK_PQUESTION        || || 
|-
|TLK_PLHURT1          || || If player's health is <= 50%
|-
|TLK_PLHURT2          || || If player's health is <= 25%
|-
|TLK_PLHURT3          || || If player's health is <= 12.5%
|-
|TLK_PLPUSH           || || If the player has pushed the NPC out of the way Ex: "Let me get out of your way"
|-
|TLK_PLRELOAD         || || If the player needs to reload
|-
|TLK_SMELL            || simpletalkers, the player {{only|{{ez2}}}} || 
|-
|TLK_SHOT             || player allies, the player {{only|{{ez2}}}} || The NPC has been shot. (Identifies location of damage.)
|-
|TLK_WOUND            || player allies, {{ent|npc_monk}} || The NPC has light wounds (health is <= 75% max).
|-
|TLK_MORTAL           || player allies || The NPC has mortal wounds (health is <= 50% max).
|-
|TLK_DANGER           || player companions, {{ent|npc_monk}} || The NPC senses something nearby that's dangerous (e.g. a grenade)
|-
|TLK_PLYR_PHYSATK     || || The NPC has been hit by an object thrown by the player
|-
|TLK_SEE_COMBINE      || || The NPC has seen a Combine NPC
|-
|TLK_ENEMY_DEAD       ||{{ent|npc_monk}} || The NPC has killed a enemy
|-
|TLK_ALYX_ENEMY_DEAD  || {{ent|npc_alyx}} {{hl2ep1}} || Custom TLK_ENEMY_DEAD for Alyx post {{hl2ep1|3.1}}
|-
|TLK_SELECTED         || || The NPC is selected by player in command mode.
|-
|TLK_COMMANDED        || || The NPC has received orders from player in command mode.
|-
|TLK_COMMAND_FAILED   || || 
|-
|TLK_BETRAYED         || || The player killed an ally of the NPC in front of the NPC.
|-
|TLK_ALLY_KILLED      || || The NPC witnessed an ally die some other way.
|-
|TLK_ATTACKING        || || The NPC is about to fire my weapon at a target.
|-
|TLK_HEAL             || ||  The NPC is healing someone Ex: "Take this medkit"
|-
|TLK_GIVEAMMO         || ||  The NPC is giving ammo to someone
|-
|TLK_DEATH            || {{ent|npc_citizen}}, {{ent|npc_monk}}, {{ent|npc_alyx}} || Death rattle; NPC has died.
|-
|TLK_HELP_ME          || || Call out to the player for help.
|-
|TLK_PLYR_PHYSATK     || || Player has attacked the NPC with a thrown physics object.
|-
|TLK_ANSWER_VORT      || || 
|-
|TLK_ANSWER_CIT       || || 
|-
|TLK_QUESTION_VORT    || || 
|-
|TLK_QUESTION_CIT     || || 
|-
|TLK_NEWWEAPON        || player companions || The NPC is picking up a new weapon.
|-
|TLK_PLDEAD           || || Player has died. Ex: "Dips on the suit?"
|-
|TLK_HIDEANDRELOAD    || || 
|-
|TLK_STARTCOMBAT      || player companions, citizens, {{ent|npc_alyx}} || 
|-
|TLK_WATCHOUT         || player companions, {{ent|npc_alyx}} {{hl2ep1}} || 
|-
|TLK_MOBBED           || player companions, {{ent|npc_alyx}} {{hl2ep1}} || 
|-
|TLK_MANY_ENEMIES     || player companions, {{ent|npc_alyx}} {{hl2ep1}} || Alyx sees more than four enemies 
|-
|TLK_FLASHLIGHT_ILLUM || {{ent|npc_alyx}} {{hl2ep1}} || 
|-
|TLK_FLASHLIGHT_ON    || {{ent|npc_alyx}} {{hl2ep1}} || Player turned on flashlight 
|-
|TLK_FLASHLIGHT_OFF   || {{ent|npc_alyx}} {{hl2ep1}} || Player turned off flashlight
|-
|TLK_DARKNESS_LOSTPLAYER || {{ent|npc_alyx}} {{hl2ep1}} || 
|-
|TLK_DARKNESS_FOUNDPLAYER || {{ent|npc_alyx}} {{hl2ep1}} ||
|-
|TLK_DARKNESS_UNKOWN_WOUND || {{ent|npc_alyx}} {{hl2ep1}} ||
|-
|TLK_DARKNESS_HEARDSOUND   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has heard an enemy in the darkness. Alyx waits 
|-
|TLK_DARKNESS_LOSTENEMY_BY_FLASHLIGHT   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has lost a enemy in the darkness because of the flashlight
|-
|TLK_DARKNESS_LOSTENEMY_BY_FLASHLIGHT_EXPIRED   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has lost a enemy in the darkness because the flashlight went out 
|-
|TLK_DARKNESS_FOUNDENEMY_BY_FLASHLIGHT   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has found a enemy in the darkness because of the flashlight
|-
|TLK_DARKNESS_FLASHLIGHT_EXPIRED   || {{ent|npc_alyx}} {{hl2ep1}} || The players flashlight has expired while not in combat {{clarify}}
|-
|TLK_DARKNESS_ENEMY_IN_DARKNESS   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has an enemy, but it's in the darkness
|-
|TLK_SPOTTED_INCOMING_HEADCRAB   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has seen a headcrab jumping at it for the first time 
|-
|TLK_CANT_INTERACT_NOW   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC is too busy to interact with an object the player is holding up to it {{clarify}}
|-
|TLK_ALLY_IN_BARNACLE   || {{ent|npc_alyx}} {{hl2ep1}}, {{ent|npc_wilson}}{{only|{{ez2}}}} || The NPC is seeing an ally being grabbed by a barnacle
|-
|TLK_SELF_IN_BARNACLE   || {{ent|npc_alyx}} {{hl2ep1}}, the player {{only|{{ez2}}}}   || The NPC has been grabbed by a barnacle
|-
|TLK_FOUNDPLAYER   || {{ent|npc_alyx}} {{hl2ep1}} ||
|-
|TLK_PLAYER_KILLED_NPC   || player companions ||
|-
|TLK_ENEMY_BURNING   || {{ent|npc_alyx}} {{hl2ep1}} ||
|-
|TLK_SPOTTED_ZOMBIE_WAKEUP   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has seen a zombie getting up
|-
|TLK_SPOTTED_HEADCRAB_LEAVING_ZOMBIE   || {{ent|npc_alyx}} {{hl2ep1}} || The NPC has seen a headcrab leaving a zombie that just died
|-
|TLK_DANGER_ZOMBINE_GRENADE   || {{ent|npc_alyx}} {{hl2ep1}} || Alyx has seen a {{ent|npc_zombine}} pulling out a grenade
|-
|TLK_BALLSOCKETED   || {{ent|npc_alyx}} {{hl2ep1}} ||
|-
|TLK_PASSENGER_WARN_COLLISION ||  || About to collide with something, Presumed to be used by Alyx in {{hl2ep2|3.1}}
|-
|TLK_PASSENGER_IMPACT   ||  || Just hit something
|-
|TLK_PASSENGER_OVERRTURNED  ||  || Vehicle was just overturned
|-
|TLK_PASSENGER_REQUEST_UPRIGHT ||  || Vehicle needs to be put upright
|-
|TLK_PASSENGER_ERRATIC_DRIVING ||  || Vehicle is moving erratically
|-
|TLK_PASSENGER_VEHICLE_STARTED ||  || Vehicle has started moving
|-
|TLK_PASSENGER_VEHICLE_STOPPED ||  || Vehicle has stopped moving
|-
|TLK_PASSENGER_BEGIN_ENTRANCE ||  || Passenger started entering seat
|-
|TLK_PASSENGER_FINISH_ENTRANCE ||  || Passenger finished entering seat (is in seat)
|-
|TLK_PASSENGER_BEGIN_EXIT ||  || Passenger started exiting seat
|-
|TLK_PASSENGER_FINISH_EXIT ||  || Passenger finished exiting seat (seat is vacated)
|-
|TLK_PASSENGER_NEW_RADAR_CONTACT ||  || Passenger notices a new contact on the radar
|-
|TLK_PASSENGER_PUNTED ||  || The Player has punted us while we're sitting in the vehicle
|-
|TLK_VORTIGAUNT || {{ent|npc_vortigaunt}} {{hl2ep1}} || Dispel attack starting
|-
|TLK_RESUME           || || "as I was saying..." or "anyhow..."
|-
|TLK_TGSTAYPUT        || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TGFIND           || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TGSEEK           || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TGLOSTYOU        || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TGCATCHUP        || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TGENDTOUR        || || not used in code, part of a "Tour Guide" NPC
|-
|TLK_TAKING_FIRE {{only|{{mapbase}}{{ez2}}}} || player allies || Someone fired at me (regardless of whether I was hit)
|-
|TLK_NEW_ENEMY {{only|{{mapbase}}{{ez2}}}}   || player allies || A new enemy appeared while combat was already in progress 
|-
|TLK_COMBAT_IDLE {{only|{{mapbase}}{{ez2}}}}   || player allies || Similar to TLK_ATTACKING, but specifically for when *not* currently attacking (when in cover or reloading)
|-
|TLK_SURRENDER {{only|{{ez}}}}   || {{ent|npc_citizen}} || Citizen just dropped their weapon in fear {{note|These {{ez}} responses are only in the {{ez2}} codebase, but a indef'd for {{ez}}}}
|-
|TLK_BEG {{only|{{ez}}}}   || {{ent|npc_citizen}} || Citizen is unarmed and threatened
|-
|TLK_FEAR {{only|{{ez}}}}   || {{ent|npc_citizen}}|| 
|-
|TLK_MELEE {{only|{{ez}}}}   || {{ent|npc_citizen}}, {{ent|npc_zombie}} || 
|-
|TLK_THROWGRENADE {{only|{{ez}}}}   || player companions, the player, {{ent|npc_citizen}}, {{ent|npc_combine_s}} ||
|-
|TLK_USE_SCARE {{only|{{ez}}}}   || the player||
|-
|TLK_TIPPED {{only|{{ez2}}}}   ||{{ent|npc_wilson}}, {{ent|npc_turret_floor}} || The NPC has been tipped over
|-
|TLK_FIDGET {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_XEN_GRENADE_RELEASE {{only|{{ez2}}}}   || {{ent|npc_wilson}}  ||
|-
|TLK_REMIND_PLAYER {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_APC_LOW_CLEARANCE {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_APC_EJECTED {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_WITNESS_EAT {{only|{{ez2}}}}   || {{ent|npc_wilson}}  ||
|-
|TLK_GOODBYE {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_SCAN_START {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_SCAN_END {{only|{{ez2}}}}   || {{ent|npc_wilson}} ||
|-
|TLK_REMARK {{since|{{l4dseries}}}}{{also|{{ez2}}}}   || the player, {{ent|npc_wilson}}|| The NPC will comment of a {{ent|info_remarkable}}
 
|}

== See also ==
*[[Response System]]

[[Category:AI Programming]]