Refer to the input text as context and select the correct relationship between 'Mafia Trilogy' and 'Xbox One' from the available options.
Options: developer, employer, platform, chief executive officer

During the first quarter 2K released Mafia II Definitive Edition and Mafia III Definitive Edition as part of the Mafia Trilogy which combines all three previously released Mafia titles into a single package for PlayStation 4, Xbox One and PC, curated by 2K's Hangar 13 studio.
platform