It's a very short prequel made for Night in the Woods. Longest Night is about Mae and her close friends, Gregg, Angus, and Bea, sitting around a campfire and searching for constellations in the night sky. The gameplay is simply the player connecting dots in the sky to form constellations. After the player finds a constellation, the four friends will discuss its origins and bring up old memories. The game is mainly about the mythologies in Night in the Woods and the friendship between the four characters. Overall, because it's less than twenty minutes long and a prequel, I believe that fans of Night in the Woods should play Longest Night to gain additional knowledge about the characters and mythologies in the game.