Demonic Announcer

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"Ka-Boom!"

— After getting nuke power-up.

"Max Ammo!"

— After getting Max Ammo power-up.

"Insta-Kill!"

— After getting Insta-Kill.

"Double Points!"

— After getting Double Points.

"Bye Bye!"

— After getting Teddy Bear from the Mystery box.

"FETCH ME THEIR SOULS!"

— When Hellhounds appear. (Said in a much deeper voice than normal)

"[Demonic Laughing]"

— When the Teddy Bear appears

"[Demonic Laughter]"

— After "activating" the bookshelf in the Doctors Quarters.