What is the meaning of "Zako Survival" in Metal Gear Solid 2: Substance

Hmm, this went a little deeper than I thought.

Zako (雑魚) is a Japanese word for tiny fish, 'small fry' as we might call them in English. Idiomatically, the term refers to weak people.

By extension, 'zako' has come to refer to carbon-copy enemies in video games or anime, the kind that rush the hero en masse to be cut down by the hero and/or player character. Synonyms for zako in this case include mooks, grunts and minions.

(Like a lot of things, the 'zako' terminology has been co-opted by the online fetish community, used to refer to groups of female soldiers soundly beaten by the heroes. Google at thy own risk.)