The main character in the game will be a passenger of the doomed Oceanic Flight 815 - it's not 100% confirmed yet, but the implication seems to be that this is a new character who has not appeared on the show yet. It appears that the game will be set up in a similar way to the television show, with adventures on the island intercut with flashbacks revealing secrets from the main character's past. Also, perhaps most importantly: yes, the game will give players the chance to go toe-to-toe with Lost's ubiquitous smoke monster. Sweet!
And here's the trailer, courtesy of gametrailers.com
Great Graphics I am sure it will be one of the best games ever played 
