It was not exactly a high profile release. I remember stores liquidating Dreamcast games and this was one that was under $5 on day one of those sales. I picked it up just because, I mean I am willing to gamble $5 on a few hours of entertainment like this (plus I am a big fan of 2.5D/3D games, lost art if you ask me).
RE: Kao the Kangaroo Jumps onto Sega Dreamcast – February 13th, 2001 - Today in Video Game History