Essency Studios

King of the World

King of the world is a free to play multiplayer RTS similar to some of the WC3 or SC2 risk gamemodes you might have played back in the day. You can have up to 12 other friends join you in epic real time battles or against AI.

The current state of the game needs some polish, but it seems the developers are paying attention to reviews and their forum, so I say its got some potential. 

There are DLC which allow for you to try out their singleplayer campaign and map editor which is pretty cool.