This clip just popped up in my recommended and reminded me all about the game. I remember seeing it a ton in gaming magazines back in the day, both from previews and ads talking about the unique Microphone-only gameplay. Of course for the time, it ended up being rather picky but is apparently still pretty unique all things considered.
Microphone functionality in games is nothing new, but I can't recall anything that went to this length to incorporate it as part of the game's identity outside "There Came An Echo" (Which was quite good). This doesn't get into other games that have used it for things such as squad commands or to talk to AI in specific manners.
This brings me to the topic of the title, I'm curious if anyone here has ever managed to play this game (Especially from start to finish). Whether back in the day, on original hardware, or through emulation (Which I believe is the easiest way to get your copy working these days, as I'm unsure how finicky PS2's usage of USB microphones is). As to this day, I'm interested in trying it myself (Outside its high price & rarity) and kind of wish a developer would go for a spiritual successor of the idea of "Voice Control Only Horror".