If you're a fan of Red Dead Redemption and similar western-themed horse riding games with lots (and lots) of fighting, Gameloft's upcoming Six-Guns might just be what you're looking for. The environments look pretty impressive, although I'm not entirely sure which games Gameloft will be borrowing the combat mechanic from just yet. Take a look:
One curious thing that sticks out in the trailer is the whole "play for free" thing. Gameloft has been predictably vague in just how players will actually pay for the game, but hopefully whatever free to play model they settle on won't be too offensive to gamers.