Description: Alien ships have invaded the Solar System. Protect your sector of space. Upgrade your ship to help defend against the invaders.
- Press "a" or "d" or the left and right arrow keys to turn left or right.
- Press "w" or the up arrow key for thrust.
- Press "Space" or "ENTER" to shoot the main gun.
- Press "q" or "SHIFT" to use the sudden death gun.
- Press "e" or "CTRL" to launch a missile.
- Press "p" to pause.