WACCA is a rhythm arcade game developed by Marvelous and supported by HARDCORE TANO*C, featuring a unique circular touch interface. Players tap, hold, and slide along the round screen to match notes in sync with a diverse selection of electronic music tracks. The game is noted for its innovative gameplay mechanics and striking visual design, making it popular among rhythm game enthusiasts. WACCA has spawned several updates and variants, but the core title remains 'WACCA.'