Hello Sergey Malgin, Thank you for contacting Steam Support. The Russian language version of this game is only available in Russian language countries. Regional availability is deteremined by the game’s publisher. If you have any further questions, please let us know – we will be happy to assist you.

Нет, не выброшу я пиратский диск с русским “Сталкером”, не выброшу.

Что интересно, “Зов Припяти” на стиме в русской версии доступен везде. Убиться веником.