Ace Combat Zero: The Belkan War is a combat flight simulation game developed and published by Namco for the PlayStation 2. It was released in 2006 as a prequel to Ace Combat 5: The Unsung War and serves as the sixth installment in the Ace Combat series. The game blends intense aerial dogfighting, a rich narrative set in a fictional world, and a unique alignment system that alters how the story unfolds.