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Has Nintendo shut down a game because it cloned the gameplay of one of their games?
(programming.dev)
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Nah, you can't patent gameplay mechanics unless they are super specific and interconnected.
Taking what's good from other games and turning it into something new (or similar) is known as remixing and it happens all the time. Like mentioned in another comment, Palworld did this by taking the fun elements of different genres / vibes (Pokémon, Survival games, Shooters) and making that into a game.
Even the Pokémon Company had to put a statement out basically telling the Xitter drama seekers to shut up and stop reporting the game for infringement, because there wasn't any.
Just make sure (like you already mention) not to use assets, sounds, names and other IP related subjects.
It still grinds my gears that Warner Bros. patented the Nemesis System they used in their shadow of war/Mordor games. I'd love a whole genre of those kinds of games with different settings and themes.
Even in their case, the phrasing within their patent form is fairly specific to their games. Unless one completely clones the system, I would be surprised if they got legal trouble for it. Better to check with a qualified lawyer of course.