A dude transmigrated/isekaid to Solo-Leveling with The gamer system. What is new? the time is before gates aka 10 years before the cannon starts. Expect a New side of the original story, how guilds were formed, government-guilds dynamics, the Mc will become strong but not very fast, and some originality. Note: I will NOT change the world-building. the Mc is neither American nor Korean.