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 Top 250, before the decay starts.
Visual novels have their own ranking called Hidden Novels.