The Invasion (NES Game)

In The Invasion by Sly Dog Studios you must stop the space aliens from reaching your weapon, which you are in control of. If they do, your game is over! To fend them all off successfully, max out the score. Use the ‘A’ button to fire, and the D-Pad to move left or right. Get your marksmanship on!

http://slydogstudios.org/index.php/1k-series/

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