Not yet, unfortunately. I think the closest we'll ever come to that is one of the successor games. I've had my eye on City of Titans (which I helped back) and Valiance Online (which I've only recently noticed). It's going to be a year before we see something out of City of Titans, possibly longer (rare is the development project that goes as planned!). Valiance Online has been allowing people to play their game as they develop it, but they're still in the pre-alpha phase, so there's not much to do other than admire the progress they're making.
I'm hoping that by the time City of Titans starts rolling out their perks, and especially by the time the game is available to play, that UE4 will either have XP support through Open GL (as I've seen discussed by several Epic Games devs at their own forums) or that I'll have a separate dedicated gaming rig running Linux. Otherwise I'll just look forward to Valiance Online (which is still XP friendly so far and looks utterly amazing for a game built in Unity 3D).