I’m just looking for things like Reincarnator or reborn: apocalypse which have layers, and a game like system or knowledge from the future. This is kind of specific so I’m not expecting much tho. Thanks
If you want both layers and system then: Master Hunter K - has stages, though unlike Reincarnator its more of you go with a random party to a stage to clear it. Omniscient Reader’s Viewpoint - Also works to some extent, there are stages, but it isn't MC's rebirth, more like he read about an MC who rebirthed thousands of times. If you are fine without layers, but system only, I can offer others.