I Became the Tyrant of a Defence Game

I Became the Tyrant of a Defence Game manhwa, 디펜스 게임의 폭군이 되었다 Tower Defense & Dungeon Attack RPG
I saw the ending to the game no one was able to clear.
But, when I came to my senses, I was inside of the game.
In fact, I was in the tutorial stage, a place where strategy was impossible.
“I’ll clear this bullshit game no matter what……!”