Again, I'm not only refering to visual content you are so eager to stick to. Take Zelda for instance, same protagonist, same villain and NPC's for the most part, near indentical story told anew every time, both story and characters with little to no depth, barely fleshed out, same items, same location with few exceptions, even order of dungeons and their layout began to repeat, recycled visual material be it from the game itself or worse, former games, and that's just the tip of the iceberg. You yourself just refer to levels it seems, even though some games don't even have levels per se.
I'm still waiting for that answer if you don't mind.
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