I'm pretty sure I played this over ten years ago, on a Windows system, first person perspective. At the beginning of the game, you're in what looks like outer space. You can pick from what look like stars, and each has a brief profile of a person. I think there was only one that you could actually pick, which described someone with suicidal impulses. Once you pick it, you wind up in a dimly house or apartment, maybe starting in the bathroom.
The house seems deserted. I think it has a kitchen, with nothing in the cabinets or refrigerator, a living room with a TV that only shows static, and another room that's wallpapered with variations on a drawing of two palm trees. You can't exit via the doors. Eventually, if you poke around enough, you find a hidden door, leading to an enclosed room that holds a man in a cage. You have the option to execute him by electrifying the cage.
I don't remember if it was explained in the game, but you're inhabiting the body of someone who committed suicide, probably after abducting the man in the cage.