UPDATE: I just moved the folder to skydrive to make it easier to view the wallpapers also I've added other wallpapers that are not always related to games! (Right now there are over 1000 Wallpapers!)
To downoad the wallpapers now, you first need to be logged into your microsoft account, then right click on the folder and press download
Maybe you've already noticed that when you click on one of your Trading Cards on the badges site, a wallpaper with the resolution of 1920x1080 opens. I've taken my time to collect these wallpapers and now I want share them with you but currently I only have 5 complete sets what means that I need your help to get the remaining wallpapers. Here is the link to the always updated wallpaper collection: LINK REMOVED
If you want to download the complete folder you need a google account, on the website click on the blue button in the top right corner then go to the google drive website, right click on the Steam Trading Cards Wallpaper folder and press Download.
Please share your wallpapers in this thread and I will put them into the collection, before uploading name the pics in the same way I've named them in the collection. Thank you
BTW: You can always view the wallpapers of badges you've already earned.
EDIT: We now have phenomenal 26 complete wallpaper sets. Thanks to everyone who helped so far.
EDIT: 40 complete sets right now!
UPDATE: Someone found a site where you can view the wallpapers of every game: http://www.steamcardexchange.net/index.php?showcase
I think I will still update the collection but not anymore so often (every 2 months an update)