"みんなでクイズ ラビィとふしぎな惑星" is an online quiz game designed for up to eight players, where users can engage in a competitive quiz format. Set on a whimsical planet called ラビホシ, players team up with a character named ラビィ to restore the planet's brilliance by answering various trivia questions. The game features diverse quiz categories including history, literature, and entertainment, with varying formats such as multiple-choice, true/false, and buzz-in questions to keep the gameplay fresh.

In addition to answering quizzes, players have the option to create their own original quizzes to challenge friends and share with the community. As players progress, they uncover secrets of the planet and unlock new features, including customization options for ラビィ and facilities that enhance the gaming experience. The game encourages social interaction and creativity while providing a fun and educational environment for quiz enthusiasts.