Platform exclusivity (also known as console exclusivity) refers to the status of a video game being developed for and released only on certain platforms. Most commonly, it refers to only being released on a specific video game console or through a specific vendor's platforms—either permanently, or for a definite period of time. Exclusivity is a topic used in discussions of the advantages and disadvantages of rival vendors in the video game market, and one which is used for marketing by vendors involved. Industry analysts generally agree that there is a correlation between availability of exclusive titles, and hardware sales. A video game's exclusivity to specific hardware may either be permanent, or timed—the latter case allowing a game to be released on different console platforms and/or PCs after a specific timeframe lapses. Permanent exclusives are often developed (first-party title), published or heavily funded by the console manufacturer. In some cases, the exclusivity may only apply to a game's console release, either for games being ported from PC to console (such as PlayerUnknown's Battlegrounds, whose console release was a timed Xbox One exclusive), or games being released on PC along with a single console. Games may also include features and content that are exclusive to specific consoles, such as features that leverage a specific platform's distinguishing features, or appearances by characters from the platform's first-party franchises (such as Banjo and Kazooie being playable characters on the Xbox 360 version of Sonic & Sega All-Stars Racing, and Fox McCloud from Nintendo's Star Fox series being playable in special content on the Nintendo Switch version of Starlink: Battle for Atlas). Timed exclusivity may also apply to downloadable content for an otherwise multi-platform game, such as Activision's exclusivity agreements with Sony Interactive Entertainment (which cover the Call of Duty franchise).