How Do I Get a "Pixelated" Effect?

Howdy! I’ve been trying to get a pixelated effect working in UPBGE for Blender 2.8 but have found that for some reason custom 2d filters are not working. I asked about the filters not working here but nobody seemed to know how to fix it so I’m wondering what alternatives there might be for that? I’m trying to achieve an effect like this.

Thank you for your time, I can provide any additional details!

This was solved by aWeirdOwl on this post!