Huh. I didn't know that the old PC-98 Touhou games used C++.

I always assumed that Zun used C - possibly including some custom ASM - due to the relative low power of the PC-98. (It's a custom 68000 machine in the vein of the Amiga for those unaware)

Still, I should have guessed. Plenty of DOS games used C++.

One thing I'm interested to see right off the bat is if Zun bothered with collision partitioning or not.