In the Avengers (2012), Tony Stark aka Iron Man announces on control deck of S.H.I.E.L.D's flying base "That man is playing Galaga!" source.
After the scene finishes the bits and pieces related to the plot, the camera turns to this operator who sneakily changes his work station back to Galaga and starts playing again.
What is the reason there was a reference to this old arcade game and why was it included in the movie? I.e. why was Galaga referenced and not some other famous arcade game?