Assassin's Creed was released for two PC operating systems, Microsoft and OS X.
Assassin's Creed . The main videogame series consists of nine games , developed by Ubisoft Montreal ( single player ) and Ubisoft Annecy ( multiplayer ) , released on PlayStation 3 , PlayStation 4 , Xbox 360 , Xbox One , Wii U , Microsoft Windows , and OS X platforms . MS-DOS ( [ ˌɛmɛsˈdɒs ] ; acronym for Microsoft Disk Operating System ) is a discontinued operating system for x86-based personal computers mostly developed by Microsoft .