User blog comment:Unrulyruby100/Hey look! Policy updates! Categorization and image sourcing/@comment-16533050-20140124065838/@comment-1500935-20140124072951

As it is written on the image information template page, if it's just screenshots took in-game there's no need to mention the one who took the screenshot except for the developers of the game who provided the base material anyway. However you can directly specify Arkane Studios or an artist in particular for things like extracted textures, official artworks and such. Source would be when images have been watermarked, like some websites do with the official promotional material they receive (from Bethesda for example) or for some extracted materials which could have been taken from a different website. However I approve that the game from which screenshots were taken has to be specified.

That way we can also avoid having talented work uploaded without even crediting those who made it in the first place, like screenshots from the Dead End Thrills community for example.

Why retro-enforced ? Because this would have been done sooner or later, and it always takes less time to do it sooner. We might also take the opportunity to remove redundant pictures, or screenshots that might look too much like others and don't add anything compared to each other. Also that way you can easily search by yourself when something has already been uploaded, removing the risk of a single image existing with different names.