Back to the end of Prime Base

[ArmySGT.]

Since the Soviet Union built whole cities around defense projects like nuclear warheads, rocketry, aircraft design, and biowarfare.....

An operative having a biowarfare weapon tailored to pass the immune response systems of 99.9999999 % of the human population is possible.

There is a damn good reason it is banned internationally.

A hostile agent within Prime Base released a biowarfare in one or more common areas, such as cafeterias. Bam, and done.

Heck, tag team them........ A Soviet sleeper agent with a mission to cripple the Morrow Project and Krell with a stolen or recovered aerial delivered nuke unwittingly cooperate and take Prime Base down.