I have embraced the subaquatic dread of not knowing which button to press in Full Fathom
The developer of Full Fathom describes it as a "thalassophobia sim". You are the lone engineer on a rustbucket submarine exploring the dangerous waters of a submerged country in an alternate reality 1990s. The warning lights on the control panel are flashing, a buzzer is spluttering like a dying bluebottle, and your robotic assistant is about as useful as an umbrella in the Mariana Trench. Things could not get any worse. And then you see it. Something in the green haze outside. Something with a tail.