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<Half-Life 2> assault_rallypoint is a point entity available in the Half-Life 2 series.

Entity description

Assault rallypoint.png

It specifies a point used to rally NPCs for assault behaviour. Used with either an ai_goal_assault or the Assault input. All assaults begin at an assault_rallypoint. NPCs move to these points when cued for an assault, optionally waiting here, before commencing the assault by heading to an assault_assaultpoint.

Limitations and bugs

  • A rallypoint can only serve one NPC per assault. If multiple NPCs are required to assault at the same time, each needs their own rallypoint. There may be a solution to this but it is not yet documented. Use of wildcards can make the assignment of individual NPCs to individual rallypoints easier.
  • NPCs will always turn to face in the direction the entity is set to when arriving at a rally point. This is might look unnatural in some cases.


Priority <integer>
How appealing the rallypoint will be. When an NPC receives the Assault input, it will select a suitable rallypoint from those available to it, prefering the one with the highest priority value.
Note.png Note: Priority always trumps distance.

Assault Point <targetname>
The first assault_assaultpoint in the chain to move to as the assault begins.

Assault Delay <float>
The amount of time to wait here once the assault cue has been given, before moving to the first assault_assaultpoint.

Rally Sequence <string>
Set a specific animation sequence for NPCs waiting to begin the assault, overriding the wait activity of the NPC.

Force Crouch <boolean>
NPCs using this assault point are forced into crouching while holding it.

Urgent <boolean>
If set, NPCs will consider movement to this rally point as Urgent Navigation (ignoring prop_physics blockers, eventually teleporting).


Pitch Yaw Roll (Y Z X) (angles) <angle>
This entity's orientation in the world. Pitch is rotation around the Y axis, yaw is the rotation around the Z axis, roll is the rotation around the X axis.


Parent (parentname) <targetname>
Specifies a movement parent. An entity will maintain its initial offset from its parent. An attachment point can be added to the end of the name, separated by a comma.


Name (targetname) <string>
The targetname that other entities refer to this entity by.
Entity Scripts (vscripts) <scriptlist> (in all games since <Left 4 Dead 2>)
Space delimited list of VScript files (without file extension) that are executed after all entities have spawned. The scripts are all executed in the same script scope, later ones overwriting any identical variables and functions.
Script think function (thinkfunction) <string> (in all games since <Left 4 Dead 2>)
Name of a function in this entity's script which will be called automatically every 100 milliseconds (ten times a second) for the duration of the script. It can be used to create timers or to simulate autonomous behavior. The return value (if present) will set the time until the next call.
Note.png Note: Try to avoid expensive operations in this function, as it may cause performance problems.



Removes this entity from the world.
Removes this entity and its children from the world.
Note.png Note: Entities already remove orphaned children upon being removed, but this input removes all children on the same frame, being marginally faster than Kill.
AddOutput <string>
Adds a keyvalue/output to this entity. It can be potentially very dangerous, use with care.
KV Format: <key> <value>
I/O Format: <output name> <targetname>:<inputname>:<parameter>:<delay>:<max times to fire, -1 means infinite>
FireUser1 to FireUser4
Fire the OnUser outputs; see User Inputs and Outputs.
Use  !FGD
Same as a player invoking +use; may not do anything depending on the entity. Can also be invoked by firing an output that does not specify an input.
RunScriptFile <script> (in all games since <Left 4 Dead 2>)
Execute a VScript file from disk, without file extension. The script contents are merged with the script scope of the receiving entity.
RunScriptCode <string> (in all games since <Left 4 Dead 2>)
Execute a string of VScript source code in the scope of the entity receiving the input. String quotation may be needed when fired via console.
Bug.png Bug: In <Left 4 Dead 2>, the code is executed in the script scope of the entity that fires the output, not the one receiving the input.
Warning.png Warning: Never try to pass string parameters to a script function with this input. It will corrupt the VMF structure because of the nested quotation marks, which then must be removed manually with a text editor.
CallScriptFunction <string> (in all games since <Left 4 Dead 2>) !FGD
Execute a VScript function in the scope of the receiving entity.
SetLocalOrigin <coordinates> (in all games since <Alien Swarm>) !FGD
Send this entity to a spot in the map. If the entity is parented to something, it will be offset from the parent by this amount.
SetLocalAngles <angles> (in all games since <Alien Swarm>) !FGD
Set this entity's angles.


SetParent <string>
Move with this entity. See Entity Hierarchy (parenting).
SetParentAttachment <string>
Change this entity to attach to a specific attachment point on its parent. The entity will teleport so that the position of its root bone matches that of the attachment. Entities must be parented before being sent this input.
SetParentAttachmentMaintainOffset <string>
As above, but without teleporting. The entity retains its position relative to the attachment at the time of the input being received.
Removes this entity from the the movement hierarchy, leaving it free to move independently.



OnUser1 to OnUser4
These outputs each fire in response to the firing of the like-numbered FireUser1 to FireUser4 Input; see User Inputs and Outputs.
OnKilled  (only in <Left 4 Dead> <Left 4 Dead 2>)
This output fires when the entity is killed and removed from the game.
Fires when the NPC arrives (activator is the NPC).

See also