Hachi Hachi is a free music game developed by Skytree Digital Limited for Android devices. It has been nominated for "The Best Audio" and "The Best Game Design" in Singapore Indie Prize Awards.

The game features over 20 talented musicians who have created music that touches the hearts of listeners. Hachi Hachi is the first real-time PvP rhythm game available on mobile and tablet devices. Players can choose from various styles of music, including J-pop, trance, R&B, hardcore, and jazz, among others. Each piece of music has its own story waiting for players to unveil.

There are two game modes available in Hachi Hachi. In "Casual Mode," players can choose their music, and the system will match them with players who have chosen the same piece and difficulty. They can also choose to play solo. In "Arena Mode," there is a weekly tournament where players can enter with their virtual coins. Every match will face a random player from around the world with a random piece of music and difficulty. The more matches a player wins, the bigger rewards they receive.

Hachi Hachi also boasts stunning artwork that immerses players in the game's atmosphere. If you're looking for a unique music game experience with real-time PvP, Hachi Hachi is worth checking out.