I Hear Some Previews About Duke Nukkem Forever But When Is the Release?

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It seems like i've been hearing previews of it for years now of Duke Nukkem Forever but it never seems to get released. Am I imagining things or have they been previewing this game for years. I finally seen a game trailer for it months back but I thought I saw a game preview for it in a gaming magazine years back. It seems like the game has no due date.