The Hazardous Environment Combat Unit, abbreviated as HECU, is a United States Marine Corps Special Forces Unit that is featured prominently in Half-Life and its expansions. Specially trained, they deal with a variety of indoor combat situations, particularly involving dangerous environments and unconventional enemies.

They are charged with guarding areas that need security clearance to enter, and taking and storing the weapons that a member of the HECU uses during his training exercises. Each soldier is armed with a MP5 (Colt Model 727 in the HD Pack) and appear to …

The Heckler & Koch MP7, also known as the SMG1, is a compact, fully automatic firearm. It is used by the Combine and the Resistance. The MP7's appearance and function resembles that of the real world MP7. The MP7's has two fire modes; primary fire is fully automatic, with a …

HECU在黑山基地中多处布设有雷场，从其露出地面的半球形顶盖与五根插脚的特征来看，它很可能参照了现实中意大利产的V-59&69型人员杀伤地雷。HECU除单纯布设雷场外，有时也会让狙击手在雷场附近埋伏，趁目标移动受到雷场限制的时机对其发动致命一击。

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Description: The Hazardous Environmental Combat Unit (Short for HECU) is the main brute force of the Resistance. It's main goal is to be a frontline unit that assists the Resistance in pushing...

二代的smg原型是mp7，现实中是作为pdw（单兵自卫武器）研发的，不仅在hl系列，在csgo中也取代了cs前作经典的MP5（貌似官方是不准备让MP5回归了csgo，csgo库存里可以将p2000和m4a4替换成能加装消音器的usp和m4a1s，而mp7不仅价格比mp5贵了200，移动速度还是冲锋枪 …

Weapons are an essential element of Headcrab Infection, allowing players in the Survivors, HECU, and Black Ops factions to engage both each other and the invading alien lifeforms in combat...

Black Ops have a total of 8 skin variations and spawn with unique weapons named the MP7-S, and the USP-S. A unique item available to all Black Ops members is the Nuke. It allows the first black Ops unit to spawn in to place a nuke at the first floor of the Black Mesa Facility.

The MP7 is a submachinegun chambered for the HK 4.6x30mm armor-piercing cartridge. It is designed as a PDW for second-line personnel and vehicle crews that can compete against Kevlar-type body armor. Although widely used, it is perhaps less well-known than the FN Project 90 that originated from the same design request.