Top 250 highly rated Steam games that few know but many love.
This ranking favours games with a high approval rating. Games ranked at the top will typically have an approval rating as close to 100% as possible, but the score is negatively affected by the number of reviews: once a game becomes too popular, its high review count will eventually sink it off the list. However, when a game maintains a high approval rating during its growth, it typically reappears on another ranking such as the Steam Top 250, before the decay starts.
Visual novels have their own ranking called Hidden Novels.