Skyrim's on sale again (PC), for those who missed it on Greenmangaming's very short sale!
They just released the creation kit (allows modding) and high res texture pack (3GB download!) with it too.
I had a -33% Bethesda coupon, so I got it for £15. Check your Steam inventory to see if you got any coupons in the Christmas sale event!
You can also get the whole Elder Scrolls collection for £31 if you fancy it.