Pop'n Music 4 Append Disc review. http://www.ClassicGameRoom.com Shop CGR shirts & mugs! http://www.CGRstore.com Classic Game Room presents a CGR Undertow review of Pop'n Music 4 Append Disc for Sega Dreamcast developed and published by Konami. Pop'n Music 4 Append Disc extends the life of your Pop'n Music controller with a new set of songs to smack buttons to... so long as you own the previous versions and can hot-swap the discs. It's a stunt Konami pulled time and again throughout their various Bemani properties like Beatmania and Dance Dance Revolution, allowing for shorter development times for upcoming releases by piggybacking many of the nuts and bolts from previous versions. That said, there are a couple mechanical upgrades, most notably the ability to increase the scroll speed of the Pop-kuns descending the screen. This video review features video gameplay footage of Pop'n Music 4 Append Disc for Dreamcast and audio commentary from Classic Game Room's TJ.