S.T.A.L.K.E.R.: Clear Sky
Gift
was S.T.A.L.K.E.R.: Clear Sky (ROW)

Steam Store . . . . . inventory screen

This gift should be without region-lock : link 1, link 2

We have been applying a gifting and trading lock of this type on all newly created packages on Steam since mid-2014. ... This change is not retroactive and only affects new purchases.

View attached image.