Mielr said:
Electronic Laser Battle Game. Still works---just tested it out with my nephew a few months ago.
http://youtu.be/HJWCN7c9ZJ4
We were so easily entertained back then. ;)
I spent many hours playing this one.
And I still have it. There was a second one I found in a thrift store I used as prop in a couple of my video projects back in college.
One of the Rebel Assault games apparently used a sound sample from this.