This game is an excellent adaptation of what might happen after the first book....you build off of a central construction base and you can build things like spice refineries and barracks and things like that.
It is still an excellent game to play over and over again. And one of the best parts is that you can also play as the harkonens and some other house that I haven't played yet but it is still cool.
The main objective is to gather credits which you do by gathering spice using the harvester and carry-alls and the spice is directly converted into credits.
But the challenge is in defending your spice operation from the other houses that will attack your harvesters and your buildings making it more difficult to gather spice which means if you only focus on the harvesting then you will not make it past the first level. So you will need to build barracks and vehicle bases so that you will have a defending force to fend off the opposing houses. This all takes place on arrakis but the one thing that is missing from this world is the capital city of arrakeen which I think would made a cool map for the game.
There is a world map with "territories" and each map is one of these territories and
as you enter each one you need to meet a spice quota to continue but once you get past the first two maps you can only invade other territories of the other houses which makes it a little more difficult and once the houses start losing territories they seem to get a little stronger. I don't really understand that part other then that it adds challenge.
Anyways this is an excellent game and I highly recommend it for anyone that enjoyed the novels or any one that like real time strategies and if you have not read at least the first book then you really need too. So download it and play and love it because that is all that matters. Once you play it you will understand that this game is one of the best real time strategies of this or any other generation except of course for starcraft, warcraft and civilizations. But still good enough that you should download it for free. Because that does not cost anything at all so get it.