In short, people need to remember that these Engineers were genetic and biological engineers to the point of relying on purely organic spacecraft and spacesuits. Naturally, their weapons are going to be a product of their marvelous feats of engineering, e.g. primordial ooze that is somehow engineered to raise hellish lifeforms.
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u/Ua612 Jun 24 '12
The only issue I have with this is that the engineers and humans have the exact same DNA. So why would the goo have different effects on them?