Pro Straightforward RTS gameplay
0 A.D. brings familiar straightforward real time strategy gameplay for free using open source code. With a mini-map in the bottom corner, resources shown in a bar at the bottom and of course unit selection through double clicking, all of the major elements found in most RTS games is here, making for a very familiar game for those that are used to the genre.
Pro One of the only free RTSes available being actively developed
When it comes to a completely free RTS that is being actively developed there are few options, or really only one, this game. So for that part, the best option available as it is really the only one. While there may be some free to play RTS options available they do rely on in game transactions where this title will have none.