欅合衆国-欅坂46 パズルとクイズの新感覚ゲーム- is a free Android game developed by kotaro yamada. It falls under the category of puzzle games and is a new and unique game that combines both puzzle and quiz elements. The game allows you to level up your favorite member of the group by solving puzzles and challenges.

The game has over 2000 questions to test your knowledge about the group, and the questions will continue to increase with future updates. If you answer the questions correctly, you can earn points for your favorite member. You can even collaborate with other fans to make your favorite member the top-ranking one.

The quiz section of the game was created by three passionate fans who stayed up all night to make the best questions for other fans to enjoy. Whether you are a new fan or a hardcore otaku, this game has content that you will enjoy.