Stronghold

On one of your patrols in deep space you encounter an abandoned base whose self-defense mechanisms are still functional. Upon detecting your presence the base launches several drones to destroy you.

After having conquered three of these attack waves a force field containing of three layers will form at the bottom auf the screen protecting a SAM crawler.

Your objctive now ist to shoot a gap into the horizontally moving force field in order to eliminate the SAM crawler while still being under attack by hostile drones.