Progenitor is written by an Overlord admirer who wishes to put his own spin on the tired concept of a VR world turning into reality.

The story follows Rein, a loyal fan of the DMMORPG Phantasm, as he finds himself in the New World, where much of what he has known of the game is no longer the same. Though, he may not be the only one desperately searching for his place in the hierarchy of this world. Accompanied by NPC's, who now are sentient and free from the constraints of computer programs, Rein slowly but surely unveils the many secrets hidden deep under thick layers of the New World's history.

In case you skipped the first line, I like Overlord very much xD.