Moirai is a very short (7-15 min) indie freeware first-person RPG which was published in 2013. Worth a few minutes of your time if you don’t mind installing/playing/uninstalling the 10MB download. Shame it’s not implemented in Unity/Flash really (I don’t say that very often!).
I’m avoiding spoilers as it only has one conceit/gimmick. Do please talk about it freely in the comments if you try it or have played it before though. It’s also available via Steam if you prefer.
What have you done?