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3)The most stupid question I ever asked -Will the windows be fully open or can we explore\look in the house through the window when we are standing next to it- as was at Dungeon Siege 1?

No, DOS will feature fixed camera.

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4)Will be there World map?

I assume so.

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5)Can we select hyperlink of(interested) topic in the text itself and not only from topic list?

????

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7)When Alpha version is supposed to be?If I understand correctly D:OS won`t be at Nov 2013 am I right?

The Alpga still may happen this month, may be next. Final release of course -- MOST LIKELY -- won't make it in 2013.

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8)Will be there achivement system? not only Steam but in-game like Divinity 2?

I think it was once mentioned, yes.