The Chess Mage of Faerûn

This is the distant world of Toril. The ethereal and vast cosmic winds drift down from the highest Seven Heavens, caressing the Prime Material Plane where mortals reside, finally merging into the unchanging Elemental Planes. And older than ancient, the River Styx flows through the Lower Planes of Baator and the Abyss, its origin unknown, its destination even more so. To the west of Toril lies the continent of Faerûn, where the gaze of the gods converges. On this land, heroes write stirring epics with swords and spellbooks, kings forge power with iron and blood, the dice of destiny have been cast, and the gods await the answer. Our story takes place on the Sword Coast, west of the Sea of Swords and south of Waterdeep, and it happens to a stranger from another world.

In layman's terms: This is the story of a D&D enthusiast, a Baldur's Gate and auto-battler fanboy, who transmigrates with a cheat system he coded himself.