|This article would greatly benefit from the addition of one or more new images.|
|Rate of fire||
Short to long
N/A (the weapon itself is named "func_tankrocket")
The Rocket Cannon is used by the HECU in chokepoints around in the Black Mesa Research Facility, mostly in the Transit System. It resembles the real world M202A1 FLASH. It fires powerful rockets that can cause significant damage if it makes a direct impact on the target. However, its splash damage does damage as well, so one should try to avoid being near a wall when seeing a Rocket Cannon firing.
- Enemies using the Rocket Cannon are easy to kill, as they are immobile while using the weapon. A Grenade or Submachine Gun grenade is enough to kill the weapon controller in one shot.
- Unlike the Tripod-Mounted Heavy Machine Gun, it is possible and easy to avoid projectiles fired by the Rocket Cannon, as it makes a loud sound when firing and its rockets are slow enough to be avoided by ducking.
The Rocket Cannon fires the same rockets as that of the RPG; the RPG laser can turn the Rocket Cannon rockets back at it.
 List of appearances
|Hazardous Environment Combat Unit|
|Characters||Minor members · Dwight T. Barnes · Sharp · Adrian Shephard|
|Classes||HECU Engineer · HECU Medic · HECU Sniper|
|Weapons||9mm Pistol · Artillery Cannon · Combat Knife · Desert Eagle · Dynamite · Fragmentation Grenade · Gun Emplacement · Land Mine · Laser Trip Mine · M249 Squad Automatic Weapon · M-40A1 Sniper Rifle · Mortar · Submachine Gun · Rocket Cannon · RPG · Satchel Charge · Sentry Gun · Shotgun · Tripod-Mounted Heavy Machine Gun|
|Transportation||AH-64 Apache · Jet · M1A1 Abrams · M2A3 Bradley · M44 cargo truck · Osprey Heliplane|
|Technology||Chargers · Powered Combat Vest · Radio · Tactical Map · Transportation · Weapons|
|Other||Hazardous Environment Combat Unit models · Military Police · Robot Grunt · Santego Military Base|
|Classes (cut)||Human Sergeant|
|Weapons (cut)||20mm Cannon|