Black Operations ( B.O., Or Black Ops )



The Black Ops, sometimes hyphenated to Black-Ops[3]  and known in full as Black Operations,[4]  are a group of trained government agents[1]  briefly seen in Half Life and later expanded upon and featured in Half Life-Opposing Forces  Soon after the HECU, they invade the Black Mesa Research Facility  to conceal any evidence of the Reconisonse Cascade.

While it is stated that the HECU and the Black Ops are officially known to enter the facility in the event of an emergency and work with the Security Force as "a dangerous and very efficient clean-up crew"[5]  (although some employees consider it a rumor[6] ), they are shown to work independently, killing all living things inside the base, whether they are Black Mesa employees, HECU Marines, or Xen lifeforms, and eventually destroying Black Mesa itself altogether through use of a nuclear weapon.

They are divided into two groups: the female and male Black Ops, also known as Female and Male Assassins.