I know you guys and gals have worked hard for the knowledge on stuff like this, but this is the only game I really want on here, and its killing me that after 2 days of trying I am back on the nes version. I got my retropie going a day or so ago, and I am reading up and learning, the nes and sns all work well and easy to use, I am struggling to get a few japanese psx games to launch, but thats another story, the main reason I wanted a retropie is Galaga, I grew up playing it as a kid and have had to play crappy version on consoles since, I have spent several hours trying to get it to work on mame in retropie, it said files were missing and it listed them all, I googled them and added them and it just said the very same thing after a reboot, I have found others on here asking the same question, but the answers are so above my paygrade that I get lost and can not get it to work, there must be a simple way to get such a small and old game to work, can some kind galaga fan, give me a simple step by step on how to get it to work so I can shoot up some aliens and be happy.