Had Spy Hunter analogue envelope and filter hardware?
It is no insult to lack complicated sound features. It's much worse when 8-bit games turn fully unplayable on non-highend CPUs by too overzealous discrete sound emulation attempts without permitting a bypass (e.g. sample based) mode. E.g. Sega vector games with speech stutter at 10% speed now on my 1.6GHz Core2Duo which runs similar games from before that update fine. Also Sega vector games without speech work well despite emulated analogue sound, and the GI SP0250 speech chip itself is digital.