Would you trust an AI to do your job? The central premise surrounding Subsurface Circular concerns increasing tension between humanity and the robots it has built to afford increasing comfort. These tensions appear to reach a boiling point when it is discovered that robots (known as ‘teks’) are starting to go missing. You play as one detective tek who takes it upon themselves to track down the source of these disappearances. However, there’s one catch: you’ll be doing so entirely on a train. Subsurface Circular is a text-based puzzle game which takes places entirely on an underground metro system in a fictional city where teks perform many of the tasks deemed too laborious by humans. All told, it’s an engaging, if not entirely. unprecedented, setup for the game’s narrative. You’ll interact exclusively with other teks throughout this short game, each having strong a personality, motivations and even feelings. You’ll negotiate, charm and sleuth your way through the teks you encounter to uncover the truth about what is happening. The game thus all plays out with chat room-esque conversation floated on-screen, but done so in an effective manner. The music and art design are also both stellar; this feels like a living, breathing city, even though the teks themselves aren’t. Without revealing plot details, the tension starts to ramp up towards the end of the journey and will keep you engaged. You’ll reach that fairly quickly, as Subsurface Circular is quite a short game that leaves the player wanting more. Given this, and its modest asking price on the eShop, it’s worth picking up and experiencing.