Impulse

It is a generic client-side console command that is used to send commands to the server without modifying the usercmd.

The advantage is that new commands can be added without compatibility-breaking networking changes; the disadvantage is that only one impulse can be sent at a time, and that the commands themselves are non-descriptive.

Confirm:Impulses are not predicted.

Syntax:

impulse NUMBER

Impulse commands are generally used for development functions and/or cheats, and almost all require sv_cheats. See CBasePlayer::ImpulseCommands(), CBasePlayer::CheatImpulseCommands() and CHL2_Player::CheatImpulseCommands().

Impulses

General

These are available in most or all Source games.

#	Notes	Description
76	Works only in .	Caches human grunt when first used, then creates npc_human_grunt which is partially submerged under floor. Mentioned in Source SDK despite the complete absence of this NPC.
81		Gives the player a weapon_cubemap, used to test cubemaps.
82		Creates prop_vehicle_jeep with targetname jeep.
83		Creates prop_vehicle_airboat with targetname airboat.
100	Not a cheat (except in )	Toggle the player flashlight. Might require item_suit or cheats (only in ) enabled, depending on the game. Bound to F by default.
101		In Half-Life 2 gives player 25 health (if the player's health is less than 100) with suit and weapons with full ammo. In Portal also gives fully charged portal gun. In Portal 2 only fully charged portal gun. In Portal 2: Community Edition gives fully charged portal gun and fully charged paint gun. In Black Mesa it does the same thing as in Half-Life 2, doesn't gives long jump module.
102		Spawns a VPhysics human skull (models\Gibs\AGIBS.mdl) from inside the player (might land behind you). Meant to spawn a "random" gib and seems to be used in Half-Life: Source.
103		Prints AI state of the NPC the player is looking at to the console. Requires developer 1.
106		Prints the class, targetname and model of the entity under the crosshairs to the console.
107		Prints the material that player is looking at to console. Only works on brushes: use mat_crosshair instead, which works on displacements too.
108		Starts debugging on NPC under the crosshair.
195, 196, 197	Nonfunctional	Supposed to show the shortest path to the nearest air, large, and human nodes respectively.
200		Plays the current viewmodel's holster animation. Doesn't actually prevent attacking. (The current weapon just won't be visible.) Not all weapons have holstering sequences.
201	Not a cheat	Creates a player spray on the brush under the crosshair. Use Options, Multiplayer to set a spray. Default key is T.
202	Obsolete	Spray blood over the brush under the crosshair.
202	Not a cheat	Plays a "player jingle" soundfile. To enable hearing/playing jingles, set cl_customsounds 1. Set the sound file for a jingle using cl_soundfile <file path relative to game folder>. Sound files must be Source-compatible WAV files under 128KB (512KB in newer engines). Jingles function using the same system as sprays, and are subject to the same anti-spam cooldown. Note:This works with the SDK codebase, but games seem to typically disable jingles.
203		Removes the entity under the crosshairs. Same as ent_remove.

Half-Life 2

#	Notes	Description
50	Not a cheat	Makes player command (call/send) a squad. Bound to C by default.
51		Spawns item_dynamic_resupply.
52		Rangefinder. Prints Starting position, ending position, 3D distance and 2D distance.
82		Spawns an armed prop_vehicle_jeep. Same as ch_createjeep.
83		Spawns a prop_vehicle_airboat. Same as ch_createairboat.

All Counter-Strike games

#	Notes	Description
101		Gives player max money amount ($16000).

Counter-Strike: Global Offensive

#	Notes	Description
100	Not a cheat	Start weapon inspection.
202		Doesn't work.