Overlord: King of Nazarick

Overlord: King of Nazarick (正版授权手游) is an original Overlord game developed by bilibili in China. News of the mobile game was released on March 9, 2023. A beta of the game was officially open for all platforms on November 21, 2023.

Overview
From the game's official website and articles, there seems to be an element of free exploration within the city and Nazarick. Furthermore, the game rules state that "the game is a strategic card role-playing game. ''

Players will transform into the Supreme Being and embark on an unprecedented fantasy adventure with Albedo, Shalltear and dozens of other original characters with exclusive skills. Not limited to the traditional card gameplay, creatively through free matching strategies of lineups and genres, the characters get rid of the restrictions of rarity, create an epic showdown exclusive to Nazarick, and embark on the road to conquer the king of another world. The bones of the sinful realm will eventually be the king. Intruders from another world, start this otherworldly adventure where the villain is the king, and become the ruler of this world!

Trivia

 * The developer is a fan of Overlord, and is creating it so that users can also enjoy the world of Overlord.