of the key distinguishing features between the game and its predecessors. Tanaka said that the wingman interaction feature introduces a "strategic and fun aspect of battle". Tanaka also stated that because wingmen play a role in the story, the player can become more involved with the characters and the drama than in Ace Combat 04. A third fictional aircraft, the ADLER, was planned but not fully developed due to time constraints. The background music of the game's main campaign mode is primarily orchestral, although the arcade mode features rock music to complement its missions' more frantic pace. The game additionally features three vocal tracks. One is "The Unsung War", a Latin choral piece performed by the Warsaw National Philharmonic Orchestra, that reiterates the "Demon of Razgriz" legend introduced in the game's campaign. Another is "The Journey Home", a recurring song that implies a theme of peace during the campaign. The game also features the licensed track "Blurry" by Puddle of Mudd, which is featured during the game's opening trailer, one cutscene, and the closing credits. Hori Flightstick 2 Officially branded as the Ace Combat Flightstick 2, the Hori Flightstick 2 is a game peripheral specifically designed for Ace Combat 5: The Unsung War. According to Hiroshi Tanaka, Namco and Hori worked together closely to ensure "that the game, the stick, and the controls matched exactly how it should play". Unlike the original Flightstick peripheral designed for Ace Combat 04: Shattered Skies, the Flightstick 2 was released in North America in addition to Japan. In the United States, the accessory was released exclusively as a bundle with Ace Combat 5; only 20,000 bundles were made available in the limited edition offer. The Flightstick 2 connects to the PS2 through a USB port. Unlike the PS2 DualShock 2 controller, the Flightstick 2 uses a HOTAS, or "hands on throttle and stick" design similar to that used in actual aircraft. The right hand controls the flight stick, which controls the plane's attitude; the left hand controls the throttle. Buttons, D-pads, and rudder controls are placed directly onto either the flight stick or the throttle. Although the Flightstick 2 does not offer force feedback, it does have a vibration feature. Although the Flightstick 2 was targeted specifically for use with Ace Combat 5, not all of the buttons on the peripheral are utilized in the game. Ace Combat 5 is the only game officially