trackmy.games

Tired of accidentally re-purchasing games you already own elsewhere? Want to stop? Look no further, you've found your solution! Sign up for an account on your website, install this browser extension and upload your game library, and you'll be warned whenever you are purchasing a game you already own. This extension currently supports Steam, Playstation (US only), Nintendo (US only) and the Microsoft / Xbox Store (US only). We hope to add more stores and features soon!

Screenshots from Chrome Web Store