"WHYYYYYYYYYYYYYY?!?!"
- The Robotic Reveal of a Hollow Child is ALWAYS a scary moment, particularly for the Hollow Child itself.
- Yoshiki's reveal as a Hollow Child is probably the most horrifying in the entire game. The slasher smile and evil red glowing eyes that dance around independently of one another might have something to do with it.
- The whole sequence with Dan, Shindo and Detective Kurosawa in the basement of the Amada building. Three humans vs HUNDREDS of zombie-like defective Hollow Children. Considering they're rejected/defective versions of robots who believe themselves to be human, it's quite possible they have the mentality of a rejected/defective human. That is to say, they're homicidally insane.
- Shindo's last meeting with Yoshiki, which instead turns out to be an encounter with a bunch of crazed robot-zombie duplicates of Yoshiki with human faces and skeletal bodies. Uncanny Valley to the Nth dregree.
- Hollow Children are the ultimate infiltration agents, and they could be anywhere. Given that one Hollow Child became Chairman of the Joint Chiefs of Staff - it passed all the background checks and vetting that needed to take place - you can't be sure you're not surrounded by them... for all you know, you could be one. Granted, the Amada AI doesn't control them, but maybe it's because it isn't trying to.
- How about the idea that your mother being a Hollow Child is considered reason enough to send heavily armed military crews to hunt you down and kill you?
- Forget the fact that he's a crazy Beta Test Baddie who is responsible for all the horror relating to Hollow Children by virtue of being their creator, what's really scary about the Amada AI is what was done to him. Imagine how you'd turn out if your "father" essentially tortured you from birth.
- The final boss, Major Philips. Not as outwardly terrifying as the above examples, but his near Dissonant Serenity and general Punch-Clock Villain attitude during the final encounter despite the circumstances puts him as far into the Uncanny Valley as the Hollow Children. Also, if you fail the small interactive QTE event involving charging Dan's Bosonic Charge underbarrel launcher at the boss, then you're treated to a very visceral blood-curdling scream from Dan as the boss's rapidly-spinning claw-arm saws him open, and while the damage to Dan himself isn't shown on screen due to it being from Dan's perspective POV, the scream and blood on the screen alone is more than enough to realize just how messy it is...
