Command & Conquer: Red Alert 2/Nightmare Fuel


 * While often Played for Laughs, the idea of being forcibly mind-controlled into serving the oppressive Soviet Union by Yuri and his Psychic Corps is certainly an unsettling prospect; as is the notion of being forced to fire on your own countrymen.
 * The Desolators, who employ nuclear-powered weaponry to melt enemy soldiers and civilians into radioactive oblivion.
 * Most of Yuri's forces. Take your pick from the psychic brain tanks, the devices which render anything shoved in them down into usable resources (including your own troops or mind controlled enemies), mind rape by the truckload, or the device which scrambles your DNA into a hulking brute, loyal only to Yuri.