Eidos Montreal has tweeted a cryptic message that a new Deus Ex game will be annnouced at E3 2013. It's short and to the point. I will post more information when it's avaiable.
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This doesn't surprise me because I remember Square Enix registered a few Deus Ex: The Fall domains. It was never really clear for what those domain registrations were for.@eidosmontreal: Are YOU ready for The Fall?” Guess we'll be seeing a new Deus Ex at E3 then!
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