Nebula’s Civilization

From the studio behind [Academy’s Genius Swordsman] and [Is This Hero for Real?]:

Choi Sungwoon successfully completed all of the achievements in the game, “Perished World,” as the No. 1 player in the game’s rankings.
After a brief moment of joy due to his achievement, Sungwoon receives a suspicious email and is summoned to a real version of “Perished World,” starting his race to becoming a “god”.