As of 9:29 AM December 25th, 2014, store.steampowered.com appears to be “offline” according to “isitdownrightnow.com”, as is the ‘steamcommunity.com’ site.
Steampowered is offering a free copy of Left 4 Dead 2 (promotion ends December 26 10am Pacific), which along with the usual Christmas registrations and Steam engine downloads and installs, is jamming the “store” servers and overloading the ‘Valve’ network. Many visitors are receiving “503 Service Unavailable” errors when visiting the site via browser or the Steam client. I was able to successfully download and install the steam engine. Everything else, such as validating purchases via email, and gaming, appears to be very slow, intermittently offline or unavailable.
I’m not a gamer, but I play Skyrim from time to time. At present, it appears that there’s the following issues currently:
There may be other issues I can’t detect from here.