Steam Game Update RSS Feeds don't work due to bad XML on Valve's side, and NC being too "smart" on yours.

[AmandaCameron]

Steam lets you get the updates for a game by going to https://steamcommunity.com/games/<app-id>/rss -- for example https://steamcommunity.com/games/427520/rss for Factorio.

The problem is, with this code it's looking for feeds in that webpage, even though it's actually an RSS feed, and on Valve's side, for some reason at the top they've got <atom:link href="https://steamcommunity.com/games/427520" rel="self" type="application/rss+xml"/> which is being detected by the discovery as the "true" RSS feed, so it's trying to parse the HTML Store page as an RSS feed, even though I gave it the correct URL in the first place.

[SMillerDev]

That's just a bug in the stream store. There isn't really a way we could detect this. Please report this to valve.