Othellonia

Othellonia (オセロニア) is a Japenese mobile strategy game. In September 2017, it had a Death Note collaboration event during which Death Note characters were available in the game.

About Othellonia
Othellonia is a mobile game based on the board game Reversi. It is available on both Apple and Android devices.

Description of the gameplay:
 * Othellonia is a black and white checkers game that features the “God”, “Magic” and “Dragon” roles. This RPG game involves checker battles that is similar to the board game Reversi. Victory over others is achieved through skill and strategy. The special abilities of each character is what makes this game diverse and different from others.

Death Note collaboration
In September 2017, Othellonia had a collaboration event featuring Death Note characters available in the game. Players can acquire the characters Light Yagami, L, Misa Amane, Kiyomi Takada, Teru Mikami, Mello, and Near. The original anime series voice actors were recruited for their characters.

Users could take a quiz on Othellonia's website to be associated with, or "diagnosed" as, a character.