Ace Combat: Joint Assault is the second PlayStation Portable game in the Ace Combat series, after Ace Combat X: Skies of Deception. It was the first Ace Combat game to take place in the real world, abandoning the Strangereal universe. It retained the tuning mechanic and status gauge from Ace Combat X.
Joint Assault was notably the first game to feature complete campaign co-op. Players could work together in two separate missions, and then join together for a "Joint Assault" operation.
In 2016, the game was removed from the PlayStation Store. Players who already owned it could still re-download it, but new players will not be able to purchase it.