Black Ops Assassin

From Black Mesa: Wiki

Overview

The Black Ops Assassins are agile members of a secret government task force, sent to Black Mesa to eliminate witnesses, kill Gordon Freeman, and plant a nuclear device in the Facility.

The Black Ops are fast and can jump very high. At long ranges it may be hard to hear their silenced Glock 17s.

Behaviour

An assassin will attack any non-assassin NPC they encounter using a mix of ranged and melee attacks. She moves very quickly and favors flipping over and on-to world objects to gain an advantage over her enemies. She will usually take a few shots and then flee, to avoid being shot. However, if she is shot then she will attempt to flip away or run away. [1]

On Medium and Hard difficulty, she will be equipped with cloaking devices, making them even harder to kill. [2] While cloaked she will emit a laser eye trail as a visual cue of her location.

Trivia

In the original Half-Life, the female Black Ops assassins had highly exaggerated bouncing breasts while walking.
The Assassin pain sounds were voiced by Victoria Teunissen [3]. She took an afternoon to make all the sounds [4].
The Black Ops Assassin appears to utilize the Advanced Knee Replacement used by Chell in Portal. Interestingly, this was a planned feature for the cut Combine Assassin in Half-Life 2.