Heavy Unit © 1988 Taito Corp.
A very rare and little known shooter from Kaneko with nice chunky sprites and very imaginative level design, also the music and sound effects are surely on a par with "R*Type".
Released in November 1988 in Japan.
NEC PC-Engine (Dec.1989)
Sega Mega Drive (Dec.1989)
Sega Mega Drive (Dec.1990, "Heavy Unit - Mega Drive Special")