A cool crossover might be the Assassins having to enter Camp Half - Blood. They would have to blend in with the demigods and learn about their powers. The demigods, on the other hand, could be trained by the Assassins in new forms of combat and stealth. This could lead to a great team - up where they fight against a common enemy, like a rogue demigod who has teamed up with the Templars (from Assassin's Creed) to take over the world of both myth and history.
In some fanfictions, the Isu from Assassin's Creed could be related to the gods in Percy Jackson. Maybe the Isu were the predecessors of the Greek gods. This would lead to a whole new set of adventures as characters from both universes try to figure out their shared history. Also, the hidden blades in Assassin's Creed could be enchanted with Greek magic in the fanfiction, making them even more powerful and useful in battles against both mortal and mythical foes.
Well, a cool crossover might involve the Assassin's Creed settings with Pokemon. Imagine exploring the ancient cities from Assassin's Creed games, but instead of just assassins, there are trainers with their Pokemon. Some Pokemon could blend into the environment like the assassins do, and they could help in combat or gathering information in a very unique way. For instance, a Flying - type Pokemon could scout areas just like the assassins' eagle vision in a sense.
One interesting crossover could be a character from Assassin's Creed using their skills in the Star Wars universe. For example, an Assassin might use their stealth abilities to infiltrate a Sith lair. They could use their hidden blade in combat against Sith warriors or droids. Another aspect could be the use of the Force in an Assassin's Creed - like way. Maybe a character discovers a new form of the Force that allows them to move like an Assassin, quickly and quietly.
One interesting crossover could be the characters from RWBY using the Assassin's Creed parkour skills. Ruby, with her speed, could be an amazing assassin, running across rooftops in Vale like an Assassin. Another could be the introduction of the Pieces of Eden into the RWBY world, causing chaos as different factions fight over their power.
In fanfiction, the powers of the Percy Jackson characters can sometimes be combined with Assassin's Creed technology. For example, a demigod with the power of invisibility could use it in conjunction with an Assassin's stealth cloak to become almost undetectable. The healing powers of some demigods could be used to quickly heal injured Assassins after a battle. This creates a really interesting dynamic where the two different power systems complement each other and create new possibilities for the story.
One interesting crossover could be the combination of the demigod powers from Percy Jackson with the vampire and witch powers in The Originals. For example, a story could have a demigod team up with the Mikaelson family to fight a common enemy that threatens both the world of Greek mythology and the supernatural world of The Originals. This would bring a whole new dynamic as the demigod's abilities like controlling water or having super strength would interact with the vampires' speed and the witches' magic.
One interesting crossover could be a battle scenario where Goku's martial arts skills are pitted against Percy's water - based powers. For example, Goku might use his speed to dodge Percy's water attacks, while Percy could use his strategic thinking to counter Goku's energy blasts. Another could be a story where they have to team up to face a common enemy, like a powerful god from both of their universes who has gone rogue. They would have to learn to combine their powers and overcome their differences in fighting styles and personalities.
One interesting crossover could be the demigods from Percy Jackson meeting the vampires in Twilight. Maybe they would team up to fight a common enemy, like a new type of monster that combines the powers of Greek mythology and the supernatural elements of Twilight. For example, a creature that can turn into a mist like a vampire but also has the ability to control the elements like a demigod.
One interesting crossover could be the characters from Percy Jackson ending up in Middle - earth from The Hobbit. For example, Percy using his water powers in the rivers of Middle - earth. It would be a cool way to see how his abilities interact with the new environment.
One interesting crossover could be the demigods from Percy Jackson getting involved in an NCIS case. Maybe they are suspects at first because of their strange powers, but then end up helping the NCIS team solve a mystery related to some ancient artifact with magical properties.
One interesting crossover could be Percy using his water powers to navigate through the flooded areas of Jurassic Park. Maybe he helps the survivors by creating water barriers to keep the dinosaurs at bay. Another idea is that the demigods from Percy Jackson's world have to face off against the dinosaurs in a special quest. It would be really cool to see how they'd use their powers against such huge and powerful beasts.