Back in the early ‘80s when kids would play Galaxian they were limited to playing it in the arcades because there was really no other good solution to playing these games anywhere else. In fact it wasn't even the first in the series of games that were kind of inspired by Space Invaders. It's a game that I used to play all the time on the NES but it originated from the arcade.
Games that I could go back and play again and again and Galaga is one of those standards.
And there's a couple of titles out there that have become pretty much standards for me. I've been a fan of video games pretty much my entire life.