Kan det här vara World Customize Creator ?
Tagami Yusuke, led by a mysterious voice, is summoned to another world, "Caltsio". He was just a young video-game lover, but Fate decided to make him become the "Evil God of Calamity" of this world, obtaining the ability to create and customize everything, Customize Creation.
Här är en del av översättningen av den ursprungliga ljusromanen:
Continuing to move the item, depicted in the 3D game, shown on the screen, with the cursor, he was thinking of how to use the [customization code]. It was a system, used to modify the stats of the item, obtained in an RPG game, however you liked.
While the main theme of the game was orthodox hack and slash (冒険活劇), which is pretty common nowadays, the Item – Customize – Create system played a big part in what got him into playing it.