If you open Atlas Arcade and no games populate, it's possible that you've already played all the games on offer at that moment on your device before (you may have them downloaded at the time or have had them downloaded in the past). In this case, you can check back later to see if there is something new.

If this is not the case (i.e. if you have never had any games downloaded on your device), please reach out to Atlas support (not the support button in the Arcade).