 If you liked
Monster ga Afureru Sekai ni Natta node, Suki ni Ikitai to Omoimasu
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 ...then you might like
Solo Leveling
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Both have a game type settings, where one needs to survive, but in a modern world where you can be overrun with monsters. In both manga the mc strive to become stronger than he was before and one of their key feature is that their journey is carried out as stealthy as possible.