Night's Foul Legions, an alternate setting for Night's Black Agents.
PCs are counter-insurgency special operations who discover a demonic conspiracy and must now find who is among the possessed—the rebels/insurgents, the local authorities, civilians, or their own forces.When I read this, I thought of how you could take the conspyramid from Night's Black Agents and flatten it out to make a relationship map, charting the spread of the demonic conspiracy as it spreads like a cancer.
Let's take the author's advice and imagine a game set in Northern Ireland, circa 1972. The players are MI5 Agents, or SAS, or undercover with the Det, or some other elite unit that gets to do as it pleases without following the rules.