Wall-Defender (c) 1983 Bomb
You are the defender and you have only one chance.
Use left joystick to move the defender and push button to fire at the aliens.
The defender moves along the outer wall and the bridge only.
Alien with different appearances in different stages, the super alien appears in different shapes and large size.
The alien patterns at the bottom of the screen indicate the number of stages you have passed.
Also released by HomeVision as "Wall Break [Model VCS 83114]".