I figured out how to get the Brazil Ending.
To obtain the “Brazil” Ending, during the chase sequence after Gregory calls her, Cassie must go in the opposite direction of Gregory’s instructions. Doing this follows Cassie finding a cutout of Fredbear, in which she must equip the Security Mask. Doing so shows a cutscene with Gregory, Vanessa & Helpi sitting on the same hill from the Princess Quest ending, and Gregory exclaiming that he found a place to hide. The game simply ends after this screen.
