Yggdrasil’s Developer YD

The story follows a man that was reincarnated into the future, or so he thought.
Instead, he was reincarnated into the world of Earth 2138, where he found a job as a developer for a game.
"Hmm, I must have seen this game idea somewhere, it seems familiar,"
"Wait, isn't this Overlord?!?!"

Note:
Not a plot following fanfic.
Rewriting some mistakes made in the early chapters.