Guilty Gear/Nightmare Fuel

"May: JOHNNY'S REVEEEENGE!!!!"
 * Testament's 1st ending in GGXX
 * Zato's treatment of Millia. Their relationship is screwed for many reasons especially that they were in a sexual relationship in the past. Not only did they broke up, but Zato turned into a Psycho Ex-Boyfriend He-Man Woman Hater that swears to hunt Millia down to the grave. Millia's only solution to be at peace is to kill Zato. It Got Worse, because even when he's dead, Zato's dead body controlled by a beast still haunts his ex lover. Millia's solution? Kill it too. Considering that Millia was an orphan and was only coerced to kill people, it's horrible that she'll be guilty for what she has done for the rest of her life. Because of Zato, she fears forming relationships and has no known friends. One can be disturbed at the thought of Eddie finding a new host because Zato-1's body is already decomposing. Just imagine what Venom and Millia feel seeing the reanimated corpse of the man they loved.
 * The alternate future., the prodigy and the next-in-line commander of the Holy Knights, died. Everybody got so demoralized, that it is described as "the day where hope crumbled," maybe except for Sol, who is inspired to take his place. But to pretty much everybody else, it's hell.
 * The ever-lovable is an Ax Crazy genocidal Magnificent Bitch who wipes out half the aerial fleet of the Holy Knights with a Gamma Ray. And feel shivers down your spine when the  you know schemes her evil plan with an evil voice, then gets really, really angry later on.
 * is dead. launch a Suicide Attack on  with the  and fails..

"Crow: You're mine now... and forever! Hmhmhmhmhm... hahahahaha!"
 * To boot, all of this was caused by I-No's really, naughty prank of befriending a teenage Ky, driving him into saving her in a hopeless situation and and laughing at it. And where is she in this timeline? Still walking around and trolling people, including an Ax Crazy Mad Doctor Dr. Balhead and  It was a very good thing that That Man decided that this kind of timeline won't do and told I-No to stop screwing around and fix timeline...
 * Even the existence current timeline qualifies as Fridge Horror as you realize that every happiness and hope mankind regains is thanks to I-No's time trolling. What if she goes back and time and changes stuff again?
 * The Crusades prior to the event of GG. Imagine a 100 year war against the worst Eldritch Abominations you can ever imagine with sizes ranging from cow size to Rhode Island size. They don't have mercy, they don't get tired, they don't fear and they are specially designed by your fellow humans to kill you with fire, claws, teeth or poison. One of them could also be your loved one just converted into a Human-type Gear. Also before the Crusades, nations were already warring with each other.
 * Some of the stages are outright scary like Nirvana and Hell's Prison. Creepy crosses? Check. Freakishly huge monsters? Check. Atmosphere with bloody tint? Check. Skulls on rocks? Check.
 * I-No's ending in Accent Core where she for screwing That Man's plans.
 * Though it may look comical on the surface, Zappa is practically Luckily, there's no proof that this is canon.
 * In the Lightning the Argent novel, several villagers are violently killed with several parts of their bodies missing. Ky goes and investigates and meets a crippled girl named Marina. Due to circumstances, Marina accidentally drank the "miracle drug," Vitae, that Ky brought and it cured her disability.
 * In Guilty Gear Judgment, a sorcerer named Raymond turned all the inhabitants in the island of Isene into underworld monsters. The monsters violently killed a considerable portion of a kingdom's population, enough for the UN to declare an international emergency. In the story, you will meet a hot chick fused with a monster plant that is screaming in pain, and she'll thank you when you kill her. Also, one stage boss is a rotating pillar with four different, demonic human faces attached to them, and their expressions are not pleasant.
 * Dizzy's second ending in Accent Core. We hear Dizzy crying for help until she slowly get's immobilized by Crow.  Horror levels up when Crow creepily says that Dizzy is his forever while the poor girl is unable to respond.