Xevious

Xevious is a vertical scrolling shooter arcade game by Namco, released in 1982. It was designed by Masanobu Endoh. In the United States, the game was manufactured and distributed by Atari. Xevious runs on Namco Galaga hardware.

Gameplay
Xevious takes place on Earth. An invading alien race has set up shop, and it's up to the player to send 'em home. The game has a large number of different ground and air-based targets of either belligerent or non-belliegerent nature. In addition to the jumper-based difficulty levels, the game also adapts its difficulty to the player. If the player is successful against a type of attacker, an even deadlier type of attacker shows up to challenge the player.

Player controls a fighter with guns and bombs that must infiltrate a highly defended area and destroy everything in sight. Overall goal is to wipe out the motherships that pop up periodically.