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S.Ciel asked a question

I remember reading a manhwa where the MC played a game and discovered that in order to win the game you have to not level up (or somethin like that) and stay level 1. Then the game becomes reality and he starts to use the information of the game and I think in some point he enter a tower... that is all I remember.
I tried to google it but didn't find it. I just wannted to re-read it, because I can't find anything to read (and already re-read alot of manhwas like that)
Anyone knows the name?