It didn't really "scare" me, but I have to mention Kakurenbo, sometimes listed as Kakurenbo: Hide and Seek. It's a 3D anime short film from the 2000s that I originally saw on Adult Swim, and I still love the atmosphere and vibe of it. A while ago I was able to just watch it on youtube, and I doubt it's been taken down.
It didn't really "scare" me, but I have to mention Kakurenbo, sometimes listed as Kakurenbo: Hide and Seek. It's a 3D anime short film from the 2000s that I originally saw on Adult Swim, and I still love the atmosphere and vibe of it. A while ago I was able to just watch it on youtube, and I doubt it's been taken down.