Complex sentence: Enemy Unknown is a turn-based tactical role-playing video game developed by Firaxis Games for publisher 2K Games, released on October 9,2012 in North America and three days later in Europe and Australia for Microsoft Windows, PlayStation 3 and Xbox 360.
Split into simpler sentences: Enemy Unknown is a turn-based tactical role-playing video game developed by Firaxis Games for publisher 2K Games. It was released on October 9,2012 in North America and three days later in Europe and Australia for Microsoft Windows, PlayStation 3 and Xbox 360.