From Game Developer Research Institute
Communication Group Plum was a publishing & development brand used by the company's Hiroshima office.
Appears to have closed down around 1996, which much of the staff joining Intec.
- The Little Mermaid, Disney's (US/EU Publisher: Capcom)
- Korean programmer Jang Sungmok supposedly worked on this for Great. 
PC Engine CD/TurboGrafx-CD
- Go! Go! Birdie Chance (under subcontract with Magical and HuneX?) (JP Publisher: NEC Home Electronics)
- Yellow Brick Road (JP Publisher: Acclaim) 
- Yellow Brick Road (JP Publisher: Acclaim)
Super Famicom/Super NES
- Bishoujo Wrestler Retsuden: Blizzard Yuki Rannyuu!! (JP Publisher: KSS)
- Sound: OeRSTED
- Super Wrestle Angels (JP Publisher: Imagineer)
- Programming Advice: Dual; Sound: Two Five