Dune II is the grandfather of all modern RTS games. While there have been many improvements of specific things (like the controls), the overall gameplay of the modern games is still the same. Unit/Structure Trees, Houses, Bases and many other familiar elements were present in this first RTS. Unit control is the most improved upon element (Dune II units could only be selected one at a time and commmands like attack were selected from a menu). This game was truly revolutionary at the time.