The Achievement Junkie by TheSilverQuill

As an avid player of the world’s largest MMORPG, Jack was dubbed the «Achievement Junkie» by fellow players. After completing all possible achievements he earned an unlikely quest, a chance to escape reality and pull Jack into another world.

Now living in Kartonia, the world he had fallen in love with in-game, Jack must start from lv. 1 with a brand new class and subclass he’s never seen before. And though his gamer knowledge is still useful, he quickly discovers that the current time in Kartonia is more than 1000 years after anything he had witnessed in-game.

Armed with what the locals call ancient knowledge, Jack must work to level up and uncover the secrets of the apocalyptic Godly War that he missed and keep it from happening again. Or would he rather start such a war on his own terms? Collapse