is a 2006 combat flight simulation video game for the PlayStation Portable. It is the first installment of the Ace Combat franchise for the PlayStation Portable, and the second for a handheld game system. Gameplay In the game's campaign mode, the player plays the role of the flight lead in Gryphus Squadron, of the Aurelian Air Force. The game is broken down into missions which involve various combat objectives, such as attacking ground targets, air targets, or a mix of the two. The "Free Mission" mode allows levels unlocked in the campaign mode to be replayed to achieve a higher rank or gain points for the purchase of planes or equipment. Ace Combat X also includes a multiplayer mode, using ad-hocwireless to connect up to four players. There are six multiplayer modes: Dogfight, Base Attack, Air Superiority, Beacon Battle and Escort Mission. The game is a mix of arcade action and flight simulation, making it semi-realistic. There are two types of controls: novice and normal. The novice controls are easy to learn and are making the game like an arcade title. The normal controls will be using both the analog nub and the d-pad for the more realistic sim-like experience. The player can choose from many real planes and over ten fictional planes, where the more advanced planes have to be unlocked first. The player can choose from variety of different viewpoints, including a third-person behind the plane perspective, and a first-person view that can be displayed from within the cockpit (showcases the interiors of all the planes in the game) or simply with a HUD. Unlockables and credits In single-player mode, new planes, medals, weapons, parts, paint schemes and bonus missions can be unlocked, where they can be purchased in the hangar afterwards. At the completion of each mission, a rank and points are awarded based on the completion time and enemies destroyed. They can be used for the new planes, special weapons or the unique unlockable parts which can change the performance and stats (Speed, Air-to-Air, Air-to-Ground, Mobility, Stability, and Defense). Medals are awarded for meeting certain conditions in either campaign or free mission mode, such as providing damage or destroying a number enemies. Each mission or level also contains a "star" unit and an "ace" unit. Destroying the star unit unlocks weapons and equipment, while defeating the ace unlocks a paint scheme. Missions The player can choose