Raw, early ZUN before he polished anything. Akyu's Untouched Score vol.3 pulls from the Eastern Demon-Sealing Record, Touhou 2 on PC-98, and these tracks have this unrefined intensity that the later games smoothed out. "Love-Colored Magic" shows up here in its original form, way more aggressive than you'd expect if you only know the arranges.
Read more
"Himorogi, Blazing in Purple" hits with dense FM layering that creates this almost oppressive atmosphere. Then "Complete Darkness" just... lives up to its name. The whole soundtrack has a darker, heavier tone than most Touhou entries.
If you've played through the Windows games and never gone back to the PC-98 era, this is where you hear how fearless the compositions were from day one.