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=553990" 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|
|137799||Steam Sub 137799||CD Key||February 19, 2017 – 15:48:57 UTC|
|137800||Steam Sub 137800||CD Key||February 19, 2017 – 15:48:46 UTC|
|137801||Steam Sub 137801||Store or CD Key||November 3, 2016 – 20:36:30 UTC|