The Longing, an adventure/idle game from Studio Seufz, tells the story of Shade, a small underground creature tasked with waking his king from a 400-day slumber, with the vast majority of in-game progression unfolding in real-world time rather than through traditional skill-based gameplay. This design makes it one of Steam's more unusual titles, as players may need to wait weeks or months for elements such as moss or mushrooms to develop, with the game continuing to progress even when closed.

Alongside slow-paced exploration of hand-drawn caves, players can decorate their home, draw with scavenged coal, or read full in-game texts such as Moby Dick and The Secret Garden. The game currently holds a "Very Positive" rating on Steam, though reception is mixed: some players restart the entire 400-day cycle after feeling they abandoned Shade, while critics have offered mixed verdicts, with one describing it as "Animal Crossing: Depressing Edition." The game features multiple endings, including one where the king is woken successfully, and has drawn comparisons to John Cage's silent composition 4'33" for its meditation on waiting itself.