This app has been deleted or is hidden to the public. There is extremely limited to no information about this app.
We don't even have a name, hence why we are displaying SteamDB Unknown App "AppID".
If you see someone screenshot a page like this and add some information/images on it, it is most likely fake.
Every change is tracked in history, and can be directly linked to.
<iframe src="https://steamdb.info/embed/?appid=503840" height="389px" width="100%" scrolling="no" frameborder="0"></iframe>
Initializing graph of a week…
Initializing graph of a year…
|SubID||Name||Billing Type||Last Updated|
|115924||Steam Sub 115924||CD Key||July 19, 2016 – 18:16:30 UTC|
|115925||Steam Sub 115925||CD Key||July 17, 2018 – 21:04:08 UTC|
|115926||Steam Sub 115926||Store or CD Key||July 17, 2016 – 18:09:06 UTC|