Arcade Mania is an episode of Steven Universe where Steven gets the gems to play at the arcade in town after a mission. It shows the gems adapting to that form of human entertainment that Steven has gotten used to when the gems were busy doing their missions. It's an interesting episode as it focuses on the gems adapting to something they have missed out because they were focused on doing their missions that would help save humanity. That would cause them to possibly miss out on the latest in human technology and entertainment. It does show more of how gems work with this episode of the arcade and how they adapt to it. This episode might not be the most important in the grand scheme of things but sure is an interesting episode and is definitely a nostalgic episode of a nostalgic show for me.