Can I make perma-death a thing in an IFC?

[Mudbill]

You could always use a CheckPoint's death callback to check for it, and do whatever from there. Though I don't think you can programmatically shut down or exit the game, you can place them in a black map with a text image or something.

To avoid the loading screen on-death, you could also just teleport them to a black box area in the map.