Here's a useless thought my head just supplied me with that I absolutely can't use.
Co-op game where if one player sees another, they die.
Both die? Just the one who does the seeing? Just the one who is seen? All players or just one crucial character? Do reflections count?
"Don't turn around. I'm right behind you. I'm going to put the mcguffin down behind you and go around the corner, I'll tell you when it's safe to turn around; let me know when you're looking away again."
Tags from @spectroscopic-gayety
Yes this, I love this idea