Becoming the Slayer God is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

When countless of my classmates were addicted to the super popular game “Battle of the Gods”, I was not tempted. This game is highly realistic, based off of powerful historical generals and mythical figures, where they battle against each other! Your potential determines your fate, the winner becomes the king while those who are defeated, eat dust. Analysis failed…..
What’s with this situation? Is it a bug?
My profile can’t be matched with a character???
In that case, congratulations on triggering the game’s hidden story!
I accidentally…... Opened it.....