Maybe the gamer gets transported into the Fate world and has to level up their own Servant - like abilities. They could start from being a novice and gradually become a powerful force, making allies and enemies along the way. They might have to complete various quests that are similar to in - game missions to progress.
Another plot could be that the gamer discovers a glitch in the Fate world that gives them unique powers. This could lead to a conflict with the established powers in the Fate universe as they see this new - found power as a threat. The gamer then has to either prove their worth or face being eliminated while also trying to figure out how to control and use this power.
One idea could be the gamer character using in - game knowledge to outwit powerful foes in the Fate universe. For example, knowing the weaknesses of certain Servants and using that to their advantage in battles.
One idea could be that the reincarnated gamer has the ability to see the hidden stats of the characters in the Fate universe. For example, they can tell the exact power level of a Servant just by looking at them. This gives them an advantage in battles and in forming alliances.
One idea could be exploring different paths the main character could take in the game world. For example, instead of following the typical quest lines, they might choose to side with a group of outcasts and change the whole dynamic of the game's story.
One idea could be a fanfiction where a gamer discovers a hidden level in a classic game that transports them into the game world. They then have to use their gaming skills to survive and find a way back. Another could be about a group of gamers who compete in a virtual tournament with a mysterious prize at stake.
Another idea is an OC gamer who creates a virtual reality game based on Fate Stay Night. But then something goes wrong, and the game world and the real Fate Stay Night world start to merge. This could lead to all sorts of interesting scenarios, like the OC having to team up with in - game characters to fix the mess while also dealing with the power struggles in the Fate universe.
One idea could be that the main character uses their gamer skills to level up their Quirk in unique ways. For example, they might treat Quirk training like leveling up in a game, with different quests and achievements related to mastering their power.
One idea could be that the gamer has special in - game skills that he can use in the Kenichi universe. For example, he might be able to analyze fighting styles like in a combat - strategy game and use that knowledge to help Kenichi train better.
A plot could revolve around a group of Pokemon gamers who enter a high - stakes tournament. But they soon realize that there's some cheating going on, and they have to expose the cheaters while also competing to win. They might use their unique Pokemon teams and strategies to outwit the bad guys. For example, one player has a team of all electric - type Pokemon that they use to disrupt the cheaters' tech - based cheats.
A cool plot could be that there is a glitch in the game world that starts causing real - world disasters. Spiderman has to figure out how to fix the glitch by going deeper into the game code, all while still dealing with his regular villains.
Another plot idea could be that the gamer system malfunctions and starts creating glitches in the RWBY world. This could result in strange creatures emerging or areas of the world getting distorted. The main character then has to figure out how to fix the system while also dealing with the chaos it has caused.
A plot could involve a gamer who is a master at first - person shooter games. In the Stargate universe, they find themselves in the middle of a battle against the Replicators. Using their quick reflexes and aiming skills from gaming, they start training the SGC teams in new combat techniques. Also, a story where a gamer accidentally hacks into the Stargate control system in the game and this somehow activates a real - life Stargate connection, leading to all sorts of adventures.