Alright guys… I broke down.
This is my base action that I use on my Sims 4 screenshots, meaning that I do adjust some settings depending on the photo.
This action does include topaz clean, so you may not get the same final result if you don’t have it installed. I found mine for free by searching for it here on tumblr. I also use Photoshop CS6 and I’m not sure if this action will work with other versions.
To install: Have the actions tab activated (Windows>Actions), and simply just drag and drop it into the tab window that opens. Or you can click the little arrows that are in the top right of that small tab window and select “Load Actions” and add it that way.
Feel free to use this as a base and tweak the settings to make your own action, but please do not re-upload and claim as your own original content.