Rock'n 4 (Japan, prototype)

Rock'n 4 is a music and instrument-based arcade game released in Japan by Jaleco/PCCWJ in December 2000, continuing a series that began with Rock’n Tread in 1999. A single player controls the experience using an eight-way joystick and two buttons to interact with the on-screen music performance. The game features vocal tracks performed by a large cast of singers alongside guitar work from Shin-ichi Iwai, all backed by sound design driven by a Yamaha YMZ280B chip. Gameplay appears centered around manipulating visual elements synchronized to the music; players likely execute actions or sequences prompted on screen in time with the rhythm and instrumentation. The game’s development involved an extensive team of programmers, artists, and musicians, including director Takamitsu Kato and sound producer Teruyuki Mori. Rock'n 4 represents a step in Jaleco/PCCWJ’s ongoing exploration of music-based arcade experiences, with a parallel project, Rock'n MegaStage, appearing on the PlayStation 2 around the same time. The game utilizes a Motorola 68000 processor to power its visuals and gameplay.