I started my zombie apocalypse campaign in a rather low-budget and low-powered way, mostly to avoid having flame throwers and incendiary grenades be the go-to solution for zombie hordes. When the PCs ran into teams from a rival corporation with more advanced tech (an Umbrella carbon copy), one of my PCs wondered why he had never before heard about the cybernetic arms and memory-wiping technology this company has at its disposal.
Since I want the game to be about the zombie apocalypse rather than an investigation into and public exposure of the secret technology this company has, I'm in a bit of a bind. How do I fix this?
One solution I thought of is creating a plausible explanation for the secrecy over profit, but I can't think of one. I'm also concerned that learning of the existence of such a company would logically, cause a huge uproar in world governments and citizens, and I'm not sure how to handle that realistically if the game goes there.
For background, I'm running ZCorps, in which a zombie virus has spread across the US over the course of a few weeks, and America is fighting extinction. The PCs are members of a corporate militia created by an emergency measure of the Senate, mandated to intervene where and when needed and to supervise the US army. (The Army needs supervision because of an unfortunate incident where they napalmed Kansas City without government consent.)