Perfect World Entertainment have announced that Stronghold Siege - 20 vs 20 PvP battles - have now been added to the Strongholds expansion for free-to-play MMORPG Neverwinter on PC. The combat is reminiscent of MOBA as it combines two maps offering three lanes for ransacking the stronghold of the opposing team.
The more recently launched Xbox One version is yet to receive the Strongholds expansions as it lags behind in terms of content, but not long ago it received a bundle of four expansions (Elemental Evil) so it is catching up and presumably Strongholds will be out before the end of the year on Xbox One.