Can I play League on steam?

Could you please clarify your question? Are you asking if the popular multiplayer online battle arena game, League of Legends, is available on the Steam platform for gaming? If so, I'm sorry to inform you that League of Legends is not currently distributed through Steam. It is instead available for download and play directly from the official League of Legends website, or through its own client application. If you're interested in playing League of Legends, I recommend visiting their website to learn more about the game, its system requirements, and how to get started. Additionally, Steam does offer a wide range of other multiplayer games that you might enjoy, so it's worth exploring their catalog to see if there's anything that catches your interest.