"Ace Combat 5: The Unsung War (エースコンバット5 ジ・アンサング・ウォー Ēsu Konbatto Faibu Ji Ansangu Wō), released in PAL territories as Ace Combat: Squadron Leader, is a semi-realistic flight combat game for the PlayStation 2. Like other titles in Namco's Ace Combat series, Ace Combat 5 features gameplay that is a mix between arcade flight and authentic flight simulation. The game was developed by "Project Aces", an internal Namco group credited with the development of the Ace Combat series, and was published by Namco in October 2004. A limited number of the games were bundled with the Hori Flightstick 2 accessory."
Source: Wikipedia, "Ace_Combat_5:_The_Unsung_War," available under the CC-BY-SA License.