A cool God of War crossover fanfiction idea would be to have Kratos cross paths with characters from the Assassin's Creed universe. Picture Kratos in the ancient cities that the assassins operate in. He could be mistaken for an enemy at first, but then they realize he has a common goal against some tyrannical force. Also, a crossover with the Legend of Zelda could be fun. Kratos in the magical world of Hyrule, facing off against Ganon's minions and trying to find his own way through the strange and beautiful land.
One idea could be a crossover with Norse mythology outside of the God of War series. For example, Kratos could meet Thor from the original Norse tales. Another could be a crossover with Greek and Roman mythology, where Kratos encounters some of the forgotten or lesser - known Roman gods. Maybe a crossover with a popular fantasy world like Middle - earth, and Kratos has to face off against some of the powerful beings there.
A crossover with another popular action - adventure game like 'The Witcher'. Geralt and Kratos could meet in a world that is a blend of their two universes. They might initially be at odds due to their different moral compasses, but then find common ground in fighting a powerful, otherworldly enemy that neither could defeat alone. This would create an interesting dynamic between their combat styles and personalities.
A God of War 4 crossover fanfiction could involve crossing over with the DC universe. Kratos could find himself in Gotham City and have to deal with the likes of the Joker and Batman. His no - nonsense attitude and brute strength would be a contrast to the more morally complex characters in the DC world. Or perhaps a crossover with the Legend of Zelda series, where Kratos and Link could exchange combat techniques and embark on a joint adventure.
One interesting idea could be a crossover with other mythologies. For example, Kratos from God of War meeting Thor from Norse mythology in a different context than the official games. This could lead to epic battles and exchanges of power and wisdom.
Well, for 'god of war atreus crossover fanfiction', you could do a crossover with other video game characters. Say, Atreus meets Link from The Legend of Zelda. Link could teach Atreus some of his unique combat skills, and they could go on a quest together in a merged world of Hyrule and the God of War world. Or, a crossover with Assassin's Creed. Atreus might get involved with the Assassins and Templars' conflict, learning about their different ideologies. And then there's the idea of a crossover with Final Fantasy. He could encounter a group of summoners and learn about their magic system.
One idea could be to have the characters from Gears face the same kind of epic battles as in God of War. For example, the COG soldiers could find themselves in a world full of Greek mythology elements. Maybe they have to fight alongside Kratos against some new, powerful monsters that are a mix of the grotesque creatures from Gears and the mythological beasts from God of War.
A God of War and Assassin's Creed crossover fanfic could be really cool. Picture Kratos in the world of Assassin's Creed, with his brute strength and combat skills clashing or collaborating with the assassins' stealth and parkour abilities. He might be on a quest that somehow intersects with the Assassin's Creed's fight against the Templars.
One idea could be Kratos arriving in the RWBY world and getting involved in the fight against the Grimm. His combat skills and Spartan rage would be a huge asset. Maybe he teams up with Ruby and her friends, teaching them some of his more brutal combat techniques.
A cool god of war fanfiction could be set in an alternate universe where the gods have different personalities. For example, Zeus could be a benevolent figure instead of the antagonist. Kratos might have to deal with this new dynamic and how it affects his own journey of vengeance. You could also write about a fanfiction where Kratos has to train a young apprentice, passing on his skills and wisdom.
One idea could be a crossover with 'One Piece'. Imagine the Tower of God characters having to navigate the Grand Line. They might face off against pirates or team up with the Straw Hat crew. Another could be a crossover with 'Naruto'. Tower of God's Bam could learn ninjutsu from Naruto and use it in his climb up the tower. A third idea is a crossover with 'Fullmetal Alchemist'. The alchemical concepts could be introduced into the Tower of God universe, like how the alchemists might try to understand the tower's power system.
One idea could be that Goku is transported to the realm of the gods and has to participate in a divine tournament. He'd face off against powerful god - like beings using his Saiyan strength and martial arts skills. His Saiyan pride and determination would make him a formidable opponent even among the gods.