Flight Guesser
A warmer-colder flight guessing game
Flight Guesser is a clever, somewhat niche-y single-player guessing game that is also pretty fun to play collaboratively with friends (by sharing one's screen).
The player starts with 1000 points per round which can be "spent" on airport guesses (you get "hotter or colder" feedback by figuring out how far away you are, in miles) or other clues.
In the opinion of this writer, the game is quite challenging – but it's a very clever concept and fun for folks who like geography and deductive reasoning.