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Nightmare Fuel: Borderlands
Sledge's Safehouse is extremely disturbing the first time around. "THEY GOT ME" written in blood on the walls, presumably written by the victims in their own blood at the command of their captors, bodies chained up all over and strung up like chandeliers leaking pools of blood, huge blood splatter everywhere, bodies stuck to the walls and ceilings via steel rods jammed through their eyes, a room with an armless body along with several dismembered appendages and a body stuck up on the ceiling, a small "Colosseum" where victims were presumably forced to fight the cannibalistic Psychos for sport, and on and on. In many cases, fresh blood still drips down from strung up bodies.
The Badass Psycho can be quite disturbing when you first encounter him. You're fighting a group of bandits, when all of a sudden, a pale-skinned mountain of a man with a right arm as long as his entire body charges you and starts swinging away with a buzz-axe. Even worse, their left arm is atrophied, as if someone sucked the muscle and bone out and injected it into the other arm. Also, they seem to be even more crazed than normal psychos, to the point of being unable to talk, instead simply growling and screaming.
Another area near Patricia Tannis's place has a body held out over the edge of a cliff by two rods. He's tied by his neck to the top and by his feet to the bottom, plenty of rope between his body and the rods, and with a brace on his neck so he doesn't actually suffocate. When you go up there, you find three bodies impaled on steel pipes to a wall, with dart boards visible behind them, and barrels under them to collect the blood. One barrel is on fire. So you go to the strung up man, and as you do, a flock of Rakks attack you. So apparently the man was put there to be fed on alive.
In Crom's Canyon, you will occasionally see natural bridges of earth connecting the two sides of the canyon. Several people can be seen hanging by their necks from them, hands bound behind their backs. One of them was on fire.
In Claptrap's New Robot Revolution, fighting the Bandit-Trap's becomes disturbing fast when one of their death cries is "Please....Just let me die". Suddenly it puts the Claptrap conversion into a VERY different light.
If you have a thing against giant hissing cockroaches or bugs in general then the Scythids when you first encounter them in a tiny, hard to maneuver space is going to be fun!!!