It's just a Playnite default Fullscreen skin with some modifications inspired by PlayOS and DH_Blur. This skin supports BackgroundChanger and ExtraMetadata logos.

Appearance
You can change appearance of Details view by changing Item spacing value (the real item spacing is not modifiable)

0 : Show icon/logo only

1 : Show icon/logo and title

Everything else : Show title only

Shortcuts:
Up : Hide UI (to admire your beautiful background !)
Down : Show game description and some extra infos

By default, only the background is shown, if you want to close this window just go down and the close button shows up!

Some ideas to implement one day :

• Change appearance of Main view
• Modify Detail View to make it minimalistic
• Transform Status view to add it game background
• Add advanced infos to detail view by pressing a key
• Add possibility to show icon in Detail view
• Add BackgroundChanger support
• Add Extra Metadata Loader support (Logos)
• Add some modifiable skin settings (icon show, title show, Play item position, theme color, ...)
• Add tools to Playnite menu (if possible)
• Add SuccessStory entry to Advanced details
• Add HowLongToBeat entry to Advanced details