Hear My Calls - Five Nights at Freddy's 3 Song (Spoken role)
calvins-509 for Springtrap (Voice)
Should sound robotic, demonic, and/or distorted. The sample I linked shows the mood I'm looking for: Twisted--as if he's happily telling the guard "You're screwed."
As mentioned in the description, I put a link to a sample, specifically the bit of the instrumental the voice will be heard in.
You thought your job would be easy? (maniacal laughter) Guess again, boy! As long as I'm here, your life will be a LIVING HELL! So give it a shot. After all I love a game of Hide and Seek. And you're next on my list.
When I did this, I was thinking of the creepy or robotic tone; and I thought to myself about the characters of the FNAF series. While it might be cooler to have the deeper and less static tone, the animatronics were supposed to be playful child-friends; so in this circumstance, I felt that a slightly more childish voice would be nice. Might even possess a great traumatic effect on the hypothetical nightguard!