Memory Required: 16K
I suppose it's a reasonable copy, but where is the fuel and the mothership? The graphics are simple but quite fast and there is a choice of three speeds. Rate of fire is too fast, making it easy to exterminiate the swooping hordes. You can use a Mikrogen II joystick - if you've got one. I didn't think it was worth the price asked.
I remember this one coming out and thinking it wasn't bad at the time, althoughit doesn't have the arcade original's details. The graphics are reasonably smooth but I thought the aliens looked more like Invaders than anything else. Another drawback is that by remaining stationary you can still get a respectable score! One or two player games.