Frontline

Alien squadrons crowd the edge of orbit. A planetary defense fleet stands between the invaders and the ground below in Frontline. Open-space dogfights fill the screen, and giant bosses push through the line with heavier armor. Alien ships press toward the planet's surface, leaving no room for a missed defense.

How to play?

Launch starfighters into orbit, where onboard weapons fire at approaching aliens on their own. Matching two identical hulls fuses them into a battle cruiser with stronger guns for larger targets. Coins and crystals from wrecked attackers buy more ships; when enemy craft gain speed with each new level, answer with hydrogen bombs, freeze, mines, or a protective dome that blocks fire for a short time.