ESRB. The last official bit of news on the spectral entity came three months ago when it was classified by the Australians, while the last sighting was an "unreleased" teaser trailer that made a quick appearance in late August.
The ESRB description notes that I Am Alive is a third-person action game where "players traverse through city ruins and use a machete to kill human enemies in melee-style-combat."
The latest launch window we had was Ubisoft's fiscal 2011–12 (April 2011 – March 2012). The good news is the game is being rated by international classification boards; the fact that almost nobody outside of Ubisoft can confirm the game's existence is just weird. We've never seen it in the three years since its announcement, like, ever.