OneShot (2016)

It greets you by your computer's username, and that's only the first time it reaches outside its own window. Niko, a cat-like child, wakes in a world whose sun has gone out and must carry a glowing lightbulb to the top of a tower, while you play the person watching over them, and Niko knows you're there. Some puzzles are solved on your actual desktop, so play the original 2016 PC release rather than World Machine Edition, which recreates that desktop inside the game. The first run takes about five hours and isn't the whole story: carry on into Solstice, and if you can't see how, a spoiler-free hint is no shame.