Greenman Gaming

Green Man Gaming is a digital retailer of PC games based in London which sell games to over 89 countries. The most unique aspect to GMG is the ability for customers to trade-in their digitally downloaded games for extra credit in their account and this credit can then be used for new purchases.
Greenman Gaming also sell Steamworks based games which are not tradeable via their service but can be added to Steam. For certain regions, buying a Steamworks game from GMG is often cheaper than Steam itself which makes buying from Greenman Gaming all the more pleasant.