Perseus Jackson: Edge of Insanity

Summary: What if there had been a third test subject of HYDRA's experiments with Loki's sceptre? This is Percy Jackson, a hero fallen from grace. He escapes from the HYDRA outpost in Sokovia and returns to New York, only to witness the death of his mortal family, driving him into insanity. Now the mercenary assassin Deadpool, Percy clashes with the Avengers, including the one woman who has seen his pain, Scarlet Witch.

Chapter 1: The Merc With A Mouth

The Avengers were having a bad day.

Another criminal found murdered. They knew this was the work of someone far less pleasant than a power crazy trickster god. With Loki defeated, they held the responsibility of protecting the world from other looming threats, such as HYDRA. So, where are Earth's Mightiest Heroes?

Lounging around in Stark Tower, depressed. They sat around the sofas and minibar as Nick Fury made his appearance with Agent Maria Hill. Along with them were the Avengers' newest recruits: Sokovian siblings and former HYDRA test subjects Pietro and Wanda Maximoff, former thief Scott Lang, ex military paratrooper Sam Wilson, and Captain America's old friend Bucky Barnes, or as they were called, Quicksilver, Scarlet Witch, Ant Man, Falcon, and Winter Soldier.

"Avengers, it would appear that our assassin has struck again." Fury informed the main Avengers sternly.

"Yes, we noticed, Nick." Tony Stark aka Iron Man casually said. "He actually murdered a gangster with a zamboni."

"That man was a member of the Aryan Brotherhood." Hill explained. "We already have Agent Daisy Johnson working on that case, we don't need a murderer to get involved in all this."

"Um, I would like to understand," Thor Odinson started. "who is this assassin we are to be questing for?"

Fury sighed, then started pacing around, saying, "He calls himself Deadpool. Not much is known about him. There've been sightings of him. He wears red and black, has two katanas strapped on his back and is armed with two standard issue pistols. Sometimes, he's even holding high caliber weapons: M4's, miniguns, grenade launchers, RPG's, you name it."

"So he packs lots of firepower, that's...bad." Clint Barton aka Hawkeye noted.

"Not just that, he appears to have superhuman abilities, almost on par with Steve's super soldier serum." Bucky told them.

"You sound like you've fought him before." Steve Rogers aka Captain America said.

"Yes, Agent Barnes has fought Deadpool before." Fury said. "He lost...badly. But he's not the only one who we know has fought Deadpool."

"Who else?" Natasha Romanoff aka Black Widow asked.

"Agent Johnson, Agent Coulson and his team, the Spider Man guy from Queens, even the same guy who was playing Galaga on the Helicarrier years ago."

Tony cracked up at that memory.

"So all these guys lost to the same man in red?" Steve asked.

"Yes, and I've had enough." Fury retorted. "Captain, Agent Barton, Agent Romanoff, Mr. Maximoff, you're all going to get your lazy asses out there and capture me an armed assassin in red and black. Everyone else, stay here and monitor the rest of the world.

The Avengers collectively said "Yes sir." and moved out.

Meanwhile...

In an abandoned factory in Los Angeles, wild gunfire was heard. Several thugs dropped dead on the floor as a mysterious figure fired its guns at a group of thugs who were stealing salvaged Chitauri technology. The figure jumped off the catwalk and charged the thugs, guns blazing. One by one, they all died except for one with a scruffy beard and bald head.

"Oompa Loompa, Doo bee dee ding...You look like a troll from Lord of the Rings!" the figure cackled as he showed himself into the light. It was a man in a red and black tactical suit and mask, holding a smoking M4A1. Sheathed on his back were two katanas, on his belt were two pistols, and on his boots were two knives.

"Who...Who are you?" the thug stammered, dropping his gun.

"I'm Deadpool, BIATCH!" Deadpool pulled the trigger...but he was out of ammo. "You gotta be joking." he groaned, before settling with knocking the thug out by swinging the rifle at his face like a club. He does the "Suck It" gesture at the thug before proceeding to stuff the Chitauri tech in a sack like he was Santa loading his bag with Christmas gifts.

"It's beginning to feel like ONE HELL OF A CHRISTMAS!" the man in red laughed as he hauled the Chitauri tech towards the warehouse doors, but they are suddenly pried open by one Iron Man.

"Okay, I hate to break it to you, man, but that technology's a tad bit too dangerous for someone like you so...hand it over." the armored Avenger explained. Deadpool's simple reply was to drop the sack and draw his katanas. He pointed one at Stark.

"Like who's gonna make me?" he asked.

His question soon got its answer when an explosion from above tore a gaping hole on the ceiling of the warehouse. Deadpool saw three figures: Captain America, Black Widow, and Hawkeye.

"We are." Cap said as Natasha and Clint aimed their guns and bow respectively at Deadpool.

"Hmm..." he wondered. "Yeah, still not convinced."

The assassin sensed danger from behind him, quickly turned around...and slashed a repulsor blast coming at him in half.

"Um, Cap, he just sliced an energy beam in half..." Clint gaped.

Natasha fired her pistols with extreme accuracy, only for Deadpool to slash them all down with his katanas in shocking fashion. He acted like he was having fun doing it.

"Shall we have a dance?" Deadpool taunted the four Avengers. "Too bad there's no music!"

They sighed and proceeded to take him on, 4 on 1. Deadpool fought Steve and Tony at close range while cutting down any arrows and bullets coming at him. He managed to kick Iron Man away from him, who fired another repulsor blast in return. Deadpool moved out of the way, causing the blast to send Captain America flying to the wall instead. Iron Man flew towards the assassin, who responded with a quick slash across the chest, stunning him and causing him to crash into some metal barrels.

It was now down to Hawkeye and Black Widow to take on Deadpool, who charged at them, swords spinning and shots fired, verbally.

"LET'S GO, LEGOLAS AND ARWEN!" he yelled out.

"Okay, that didn't make any sense." Natasha sighed as she moved out of the way of the red and black man's katanas, which were spinning like a steel tornado of death before slicing down another arrow Clint shot at him, unaware its arrowhead was a timed explosive. Natasha quickly moves out of the way, leaving Deadpool to comically realize what kind of arrowhead he was standing two inches away from.

"Goddamnit." he groaned as the explosion sent him flying a couple of meters back, but he managed to get his feet back on the floor really quickly, only to see that not only was he surrounded by four Avengers, but also a Quinjet with a minigun aimed at him, not that he was scared. He was Deadpool! Why should he be scared of such things?

One word,

"FLASHBANG!" Deadpool tossed said grenade on the ground and let it detonate, confusing the Avengers and the Quinjet as he smashed through a glass window and got on his red motorcycle and drove off.

"He got away!" Natasha grumbled before cursing in Russian.

"Let Pietro handle him." Director Fury spoke through their earpieces. "In the meantime, get that Chitauri tech."

Deadpool thought he was safe. He figured they'd be more intrigued with the Chitauri tech more than him, seeing how such weapons ended up in the hands of common crooks. Well, he wasn't safe, especially when right in the middle of the road, he gets smacked off his motorcycle by a blurry figure. Deadpool fell and crashed into the bushes along the side of the road while his motorcycle skidded into the trees. He got up on his feet and the blur appeared before him as a young man with sandy blonde hair, scruffy facial hair, and a white and silver outfit with matching goggles.

"Didn't see that coming?" Pietro snorted.

"Nope, but what about this?" Deadpool drew his handguns, which he fired at the speedster, who began dodging the bullets at a fast pace. He managed to punch Deadpool in the face, knocking him down. Pietro ran off and set up for a faster, more powerful attack. He ran towards Deadpool...who somehow stopped him...with a punch to the "area".

"Anticipated yo move!" Deadpool laughed. "That's how I instantly found my groove!"

With that, he quickly escaped on his motorcycle, leaving Pietro in the grass, holding onto his sensitive parts in pain.

'Why was his voice...familiar?' Pietro thought while he waited for someone.

Deadpool made it back to his hideout: a run down, abandoned gangster hideout in an old, smelly ass alley. At first glance, there's barely anything to see in the middle of the night, nothing but a stinky green dumpster with the same big rat scavenging it for food. Meanwhile, said rat hopped off its place on the edge of the dumpster when the mercenary arrived in his red motorcycle, speeding down the alley without any lights on. Of course it was dangerous, but he was used to it. Deadpool turned his motorcycle at the last second, reaching the end of the alley. He hopped off, stretched a little until he heard some bones crack, and walked to his left and opened a dark oak door before coming in.

"Alright!" Deadpool hopped up and cheered as he literally tossed his weapons aside.

"Now, let's kick off these Sunday shoes!"

And by that, he kicked off his boots, making them clatter on the floor to make drum noises with the old wooden floor. Deadpool strolled over to the living room and crashed onto the couch and taking off his mask.

The once bright, now scarred and partly burnt face of Perseus Jackson shone with the only ceiling light in the room.