ALL Steam games are now region-locked in RU/CIS, South America, South East Asia and Turkey

Response from dev forum:

"As most of you know, our developer tools suggest pricing based on market research and purchasing power parity. In the case of territories such as Russia, Brazil, and SE Asia, we suggested pricing that is lower than the direct USD conversion. This is based on our assessment of actual pricing of comparable products in that market. Recently Rubles have hit an all-time low which has been a concern of many game developers. We are still assessing the market to see if suggesting new prices in Russia is right for customers who live in that market. We do not think that pricing based on currency conversion only is the right way to approach the Russian market necessarily.

What we are doing immediately in response to the Ruble drop is limiting trading and gifting from Russia to prevent people from taking advantage of the situation. We have been applying a gifting and trading lock of this type on all newly created packages on Steam since mid-2014. Today we have propped a change that will affect all packages on Steam which will not allow them to be unpacked to an account, if gifted or traded from a lower priced region to a higher priced region. This change is not retroactive and only affects new purchases. It also will not affect customers in that region from gifting a copy to other people in that same region. All customers will have proper warning when they are purchasing a gift prior to checkout in those regions as well. We will continue to assess the situation and make changes if necessary in the future. If you have any questions please feel free to write us via the contact form via the Steamworks Development site - Documentation & Help -> Contact Steam Publishing."