Was R-Type II it's own game?  I'm confused because my experience with R-Type was on the TG-16.  The PC-Engine version was split into 2 separate hu-cards, labeled R-Type 1 and R-Type 2.
The first had levels 1-4, the latter had 5-8.  They combined them into one whole game for the TG-16, resulting in all 8 levels.  This is a completely different thing though, right?