What makes a rare answer?

In rare-answer trivia, several answers can be right. Finding a valid answer that players are less likely to think of is the challenge.

Six tiers on the mountain

Peakillion starts at Foothill for 10 points and ends at One in a Peakillion for 100. Scores come from an edited answer list. The best answer fits every condition in the prompt, even if it is hard to think of.

See a sample prompt and the full scoring rules.