Picross Lord of the Nazarick is a puzzle game in which players solve Picross puzzles with the various characters that appear in the Overlord series. Its story is set in the Great Tomb of Nazarick, immediately following the founding of the Nation of Darkness, where Ainz Ooal Gown and his subordinates look back on their exploits thus far. By solving Picross puzzles, you will recall the memories of the characters and key items that revolve around their story.
The game features a total of 519 problems across standard Picross, Mega Picross, Clip Picross, and Color Picross modes, as well as a gallery featuring the images from solved Picross and Color Picross problems, plus additional images unlocked through specific methods.
Here are some screenshots: