What?! is this real its so epic Crysis 4 "Human After All" - Flesh,Blood...and Nanos? by Maverick Minded on SoundCloud - Hear the world?s sounds (http://soundcloud.com/maverickminded/human-after-all)

No, someone just made a track in the Crysis 3 soundtrack style.

definitely fanmade. It sounds too weak for the game's soundtrack comparing to the trilogy's soundtracks (even if it is a demo track). Samples are too cheap and melody is too (the way too!) simple.

Crysis 4 is coming: PlayStation 4's 'Crysis 4' confirmed from Crytek (Photos) - National Video Games | Examiner.com (http://www.examiner.com/article/playstation-4-s-crysis-4-confirmed-from-crytek)

It is fan-made, just like Ares13 said.