There’s a video game of The Great Gatsby. Alas, it’s a hidden object game and not a first person shooter. (Everyone in that novel needs to die, from the narrator on down. Gotta be done.)
There’s a UK videogame of Lost Horizon that came out in 2010, though I haven’t seen it. You can download the demo still, at various fine purveyors of games. This is one of those “Nazis are invading Tibet” sequel situations. Looks pretty, though.
BTW, a lot of said videogame purveyors, from Amazon on down, have sales running right now.