As it turns out, in "The Avengers"... it was the MSX port of Galaga. (I'm sure a few of you never heard of the MSX, but I'm sure all of you could tell it was a port.)
... and they copied a YouTube video at that.
As I'm sure you guessed, I knew all along it wasn't the real Galaga and I could tell it was gonna be some weird port. Hadn't figured on the YouTube copying.