[PAR] [TLE] Unity (game engine) [SEP] Unity is a cross-platform game engine developed by Unity Technologies, which is primarily used to develop video games and simulations for computers, consoles and mobile devices. First announced only for OS X, at Apple's Worldwide Developers Conference in 2005, it has since been extended to target 27 platforms. [PAR] [TLE] Sylvio (video game) [SEP] Sylvio is an indie-developed first-person horror adventure video game released on Steam in June 2015 for Microsoft Windows, PlayStation 4, Xbox One and, OS X, utilizing the Unity engine.  The game is about an audio recordist called Juliette Waters, who records the voices of ghosts through Electronic voice phenomenon.  She finds herself trapped in an old family park, shut down since a landslide in 1971, and she now needs to use her recorder to survive the night.
[PAR] [TLE] Unity ( game engine ) [ SEP ] Unity is a cross - platform game engine developed by Unity Technologies , which is primarily used to develop video games and simulations for computers , consoles and mobile devices . First announced only for OS X , at Apple 's Worldwide Developers Conference in 2005 , it has since been extended to target 27 platforms . [PAR] [TLE] Sylvio ( video game ) [ SEP ] Sylvio is an indie - developed first - person horror adventure video game released on Steam in June 2015 for Microsoft Windows , PlayStation 4 , Xbox One and , OS X , utilizing the Unity engine . The game is about an audio recordist called Juliette Waters , who records the voices of ghosts through Electronic voice phenomenon . She finds herself trapped in an old family park , shut down since a landslide in 1971 , and she now needs to use her recorder to survive the night .
Sylvio's engine has been extended to how many target platforms?
Sylvio 's engine has been extended to how many target platforms ?
27
27