Project Jelena is a cancelled action game that was in development by Crytek in 2008, probably for PC. There are not many info about this game or why they decided to stop the development, but we know that the Forest map featured in one of CryEngine 3′s SDK is an area from this unreleased title. Jelena should have been the girl with a scarf that we can see in some other CryEngine 3 tech demos and also in some concept arts that you can see in the gallery below, archived to preserve the existence of this lost project.
As we can read at DSOGaming:
Our guess is that the player would control the male character and would have to protect and escort the girl to safety. In one particular concept art, we can see the main characters hiding from a bunch of people (suggesting that the game would feature survival elements), while on another we can see a destroyed car with two characters searching for survivors.
CryENGINE 3 was later released on October 2009 and now Crytek are working on Crysis 3, Ryse, Warface and Homefront 2, but maybe in the future Project Jelena could be resurrected.
Thanks to USERDANTE for the contribution!