Huh. I didn't know that the old PC-98 Touhou games used C++.<p>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)<p>Still, I should have guessed. Plenty of DOS games used C++.<p>One thing I'm interested to see right off the bat is if Zun bothered with collision partitioning or not.
I wonder if this was mostly a manual effort, or used one of the various automatic decompilers which have become available in the past few years? I can already decompile manually into C/C++ about as quickly as I can read the Asm, but IDA/Hexrays can do it several orders of magnitude faster.