Do Envisioned Count as Kills?

Envisioned count as a "kill" so this should be taken into consideration if going for a no-kill run. ... When the Envisioned use Blink, they disassemble themselves into smaller rocks, with the rocks fly toward and reassemble at their intended destination.

Does chaos matter in Death of the Outsider?

Death of the Outsider is the only game that lacks the chaos system but in certain occasions, choosing to kill or not will still lead to different outcomes.

What happens if you kill the outsider?

When you inspect the Outsider, you can select to stab and kill him. Killing the Outsider will earn you the “Deicide” achievement / trophy. And that's everything you need to know about the multiple endings in Death of the Outsider.