Knight of the Skies 2: Battle of the Skies

Game description:

In Knight of the Skies 2, you must use your plane, your guns, and your wits to defeat the menacing battalion of the Skies. You can fight alone or team up with another Knight of Heaven, but you must be prepared for a tough battle. The enemy outnumbers you, so you must stay vigilant and use all of your skills to survive.