For hundreds of years humanity thought that the titans were the top of the food chain but they were wrong now there are something that are more bigger,faster, stronger,smarter, more dangerous creatures that outside the walls but one is the strongest of them all either called a king or god to humans but still a monster. Some think they are savories, others think they're Destroyers but there is one question they have to answer: Are they with Humanity or against us. That question was answered on one day when the titans breached the wall. This is where our story begins. (I don't own Godzilla or Attack on Titan universes they belong to the rightful owners)

Note: this is a (x Male Reader) book/story. You are a 10 year old Kid with a past that is unheard of. Most records on you can't be found, but why is that and why do you call yourself a MONSTER? Find out more by reading this book. reference: (Y/n)=First name (L/n)=Last name (E/c)=eye color (H/c)=Hair color (H/l)= hair length Etc I don't own Attack on Titan or anything in the book/story except the story it's self.

Titans have always been humanities greatest threat, but what would happen if there was a threat that even the titans feared in the form of nature's most powerful weapon called, The King of the Titans. Disclaimer: I don't own Attack on Titan and its characters as well as any elements from the Godzilla franchise and Kaiju No 8, just this story and my oc. A/N: This story will follow the canon manga of Attack on Titan, however, with a few changes as a slight AU and it will also change the ending. This story will follow my oc that is also a Titan Shifter except he is not connected to the Nine Titans. He'll also have a harem consisting of Annie Leonhart and Mikasa Ackerman.

The Year is 2799, Everyone in New York III are waiting for the Clock tower to strike at 12 AM for New Year's Eve. That is after when a strange Roman-like structure out of thin air just appeared in front of the clock tower. While everyone was asking each other what just happened. A Roman-looking army marched forward from the Gate itself. They started attacking everyone, wyverns, orcs, goblins, trolls, mages, elves, dwarves and other demi human-looking monsters attacked and slaughtered everyone they see, children were not spared either, As they kept attacking the City The Military was alarmed, and ready to fight whoever these invaders are and where they came from, How will a Very advanced and futuristic civilization react to such barbaric and savage Roman looking army that looked like they came from Ancient Roman times but with Fantasy Monsters on their side? You already know what will happen. (Note: I do not own any pictures in this story. All illustrations and works put here belongs to their rightful owner. Credits to them)

It was on that day that the roar of Humanity's Rage rang out and Humanity knew that a victory was gained against the monsters that had trapped them in the walls. However, something tantamount to armageddon broke through the barrier that that between realms and from the heavens descended a true thing that inflicted fear upon its victims. He would rip and tear until the world was devoid of titans. unbeknownst to him a new presence would arise from his appearance.

Game X-Over and Marvel Crossover Call Of Duty IW/AW and Halo S.A.T.O 7th Fleet was sent to investigate an unknown Forerunner planet to discover the energy readings on the planet. Captain Thomas Lasky from S.A.T.O sent a recon team comprised of Spartans (II, III), Sentinel Task Force and S.C.A.R team to locate the unknown artifact. When the team retrieved the artifact they bring it to the Infinity, when the artifact activated an unknown slipspace began dragging the fleet to an unknown universe that sents them to the Marvel Universe. Note: I do not own Marvel, Halo, and Call Of Duty IW/AW. In this world, S.A.T.O (Solar Alliance Treaty Organization) is a formal alliance between the U.N.S.C and U.N.S.A. There primary focus is to defend Earth and all colonies from threats outside their world. I will also be using elements from Splinter Cell and Metal Gear.

IW/AW and Halo - Gate Crossover S.A.T.O Infinity was exploring the vast distance of space, when they discovered a earth like planet in the Sagittarius Dwarf Elliptical Galaxy. There they spotted a strange structure known as the 'Gate', where it leads the soldiers of the empire to another world. A world 500 years back in the past. Authors Note: I do not own IW/AW, Halo and Gate. They all belong to their respective companies. There will also be OC's in the story. The story is connected to my other known as 'First In The Fight'.

A particular Mandalorian, lost his way while in hyperspace accidentally traveling through a time rift. Arriving to another world filled with man-eating beasts, adopting an orphaned young girl, and finding a walled-off population. How will Mando survive this cruel world? The Mandalorian and Attack on Titan belong to their respective creators: Jon Favreau and Hajime Isayama, respectively. I own nothing in this work nor do I own the photos that are used.

The Empress of man had created 20 Primarchs to be her generals and leaders during the great crusade. Each one had there own unique and special abilities. However something went wrong and a extra primarch was born, the man YN LN would lead the 21st Legion against the horrors of the galaxy. Can he bound with his fellow warlords and unite the galaxy, or will he watch it burn?