Mach Rider (Credits)
Kyoto Ninja 27 Nov 2012 20:28
(Source 1: Mach Rider High Score Staff Initials)
HAL = Hal Laboratory
CSE = ???
HNY = Akio Hanyu
GSX = Hiroaki Suga
EGG = Reference to Eggerland I think (Japanese version of Lolo)
FLZ = Makoto Kanai
K.M = May be Makoto Kanai's name locally (Kanai Makoto)
NAV = Probably Yasunari Nishida
YOK = Possibly Miyo Aoki
MIK = I'm pretty sure it's Mikio Ikeda.
Hope this helps.
-Doommaster1994