Oxenfree II: Lost Signals is the announced sequel that continues the narrative with new characters and mysteries, 

For more info, you can check here: https://www.netflix.com/tudum/articles/oxenfree-ii-lost-signals-release-date-details.
- Android: https://play.google.com/store/apps/details?id=com.netflix.NGP.Oxenfree2LostSignals
- iOS: https://apps.apple.com/us/app/oxenfree-ii-lost-signals/id1600733369