HECU

The Hazardous Environment Combat Unit (HECU) is a United States Marine Corps special operations unit. They're an enemy faction in Half-Life/Black Mesa and Blue Shift, and the playable faction of Opposing Force.

Equipment

 * Typical USMC gear and gas-masks
 * MP5 (M4 Carbine) with grenade launcher
 * M249 Squad Automatic Weapon
 * Desert Eagle