Overlord: All In One Demon

Ryouta dies due to an accident and finds himself faced by an otherworldly goddess who is willing to grant him wishes, but there are limitations. However, Ryouta uses his intelligence to reincarnate into the world of Overlord, along with a system that compiles information for him. What kind of cheats does he have, and how will his adventure unfold in the world of Yggdrasil and New World? Note: Hello, everyone. I decided to write this fanfic after reading other fanfics that involve multiple Variant concepts like Multiverse and the Ancient One. First of all, this fanfic is mostly wish fulfillment, so please don't expect god-level writing. Also, the MC will be overpowered. Second, the Yggdrasil Arc will be present, but it won't be too long, like 50 chapters of Origin. It will still be a part of the story. Additionally, it might become a world-traveling story if you all want, but the focus will remain on Overlord's characters and world.