LogFAQs > #960829769

Bofuri is about playing an MMO, and That Time I Got Reincarnated as a Slime revolves around gamey systems. The spider isekai is mostly about the levelling process... except the anime also focuses a lot on the political side of stuff which is a lot more boring.

There's a ton more that heavily involve game systems, but the vast majority of them start out with a main character that is absolutely impregnable bringing over their level 99 characters into a world where the strongest are like level 40. The three up there... still kind of delve into OP territory, but at least there's a clear progression of power improvement.

There is an absolute fuck ton of isekai manga with a million different premises if you go searching there though.