grenade_helicopter

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January 2024

Episode Two model.

grenade_helicopter is a point entity available in Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, and Half-Life 2: Deathmatch. It's a time-bomb dropped by npc_helicopter.
The timer is only activated when the bomb comes in contact with the world geometry, or any props. If You manage to catch one by pressing +use on it before it touches the ground, you'll be able to hold unarmed, until you touch it against anything.
Upon touching an NPC or most other props it will detonate immediately. The bombs are also buoyant.

Note:In the HL2 Episodes, these bombs have double velocity when launched by the gravity gun. They will also delay the timer when picked up with the gravity gun, so that they can be aimed.

In code, it is represented by theCGrenadeHelicopterclass, defined in thenpc_attackchopper.cppfile.

ConVars/Commands

Cvar/Command	Parameters or default value	Descriptor	Effect
sk_helicopter_grenadedamage	30	Health amount	How much damage a bomb can do.
sk_helicopter_grenaderadius	275	Hammer units	Radius in which a bomb will damage objects, when it explodes.
sk_helicopter_grenadeforce	55000	Arbitrary number?[confirm]	Amount of force given to moveable objects when an explosion occurs. This seems to be tied in to the damage and radius in some manner.
sk_helicopter_grenade_puntscale	1.5	Multiplier	Exists, but does nothing. Intended to be a scalar for how much force the gravity gun gives to helicopter bombs when launching.
sk_helicopter_num_bombs1	3	Arbitrary number	Number of bombs needed to kill a helicopter, on Easy difficulty.
sk_helicopter_num_bombs2	5	Arbitrary number	Number of bombs needed to kill a helicopter, on Medium difficulty.
sk_helicopter_num_bombs2	5	Arbitrary number	Number of bombs needed to kill a helicopter, on Hard difficulty.

Flags

• 65536: Dud. Will only explode after being launched by the gravity gun.

Keyvalues

Note:Content moved to Rendering and studio model related KIO/Keyvalues for continuation of page history

Inputs

ExplodeIn <floatRedirectInput/float>

Tell the bomb to explode in this many seconds.

Note:Content moved to Rendering and studio model related KIO/Inputs for continuation of page history

Outputs

OnPhysGunOnlyPickup

Fired when a player picks this object up with the gravity gun. +use pickups do not fire this output.

Note:Content moved to Rendering and studio model related KIO/Outputs for continuation of page history

See also

• npc_heli_nobomb