History Civil War Secret Missions is a shooter video game developed by Cauldron HQ and published by Sony. It was released in 2008 for the Sony PlayStation 3 platform and is rated T-Teen. The game is part of the Call of Duty video game series and features extreme sports as a sub-genre. The game takes place during the American Civil War and includes secret missions. The game comes with a manual and is designed for the NTSC-U/C (US/Canada) region.