An overview of features for Playnite extensions.
These tables are not yet complete, and fields marked with a question mark (?) I have not yet had the time to research or confirm. Feel free to contribute by filling those in, or adding columns or rows to the tables, or fixing typos in a pull request.
Library extensions allow you to import games from other services/websites/clients/consoles.
Metadata extensions get all the data that defines games for you, including their images.