Basically, when they made the 2 it was a huge jump from the one and everyone were very involved in that evolution, the players like the makers. Bringing death and life, 3d... That was awesome and they were a wish to be really astonishing.
So that give birth to a product full of quality with some delightful new animation.
The three was mainly oriented to the open world and customization, but did put aside this deepness, still interesting in its own way but not everyone can spend time to find the limits and avoid the error 12.
The 4 well on a side was an old dream some players had since the one to bring emotions, multitasking... But all in all not that a real revolution and not so successful in my own opinion. And surely not with the same passion involved when they built the 2.
