Complex sentence: Many spin-off games have been made for Nintendo DS, PlayStation Portable, PlayStation Vita, iOS, HP webOS, Android, Nokia Symbian Windows Phone platforms, the handheld games are developed by Gameloft and Gryptonite Studios, with additional development by Ubisoft Montreal.
Split into simpler sentences: Many spin-off games have been made for Nintendo DS, PlayStation Portable, PlayStation Vita, iOS, HP webOS, Android, Nokia Symbian and Windows Phone platforms. The handheld versions are developed by Gameloft and Gryptonite Studios, with additional development by Ubisoft Montreal.