Pretty much every sequel was a step forward.
coughciv5cough
RFC (vanilla, DoC, Europe, Asia, Classical World and SoI) is the next step.
However, civ5 has some very interesting features that should be added:
*city-states
*hexagonical grid
*1 tile expansion per cultural level which you choose
*can't occupy an occupied tile, but you can pass through it
*social evolution system that replaces the cultural victory
If all mods that refer to civ4, plus the above features, plus the civIII features (well except from the waste and the agreement abuse mechanics, a minor version of corruption should be added) were added in one major mod, with a really huge map and about 2500 turns, and a code that calculates everything in no time, plus all types of victories, it would be the best.
Oh, I forgot...
Spoiler :
a real workout of graphics, and a system of camera manipulation, I think it is a temporal problem of the civilization series.
A system of stages could be added. For example you start controlling a mesopotamian city as in SoI, and after some conquests the map and time escalation changes, so that you play a game like DoC. After you conquered the world, the escalation re-changes and you play a Final Frontier game. The escalation could also change during battles, so that you play the siege of Constantinople as in Defense mod.
Don't forget to add "backturn" button, which goes back to time and a parallel universe screen, where you see all your saves on a parallel universe tree (for example if you played turn 128 three times, you will see these three different parallel universe lines to pop up from the 127 save).
I'm thinking why not adding a city-building feature like in SimCity... In the final analysis that's the UP of civ4, it can absorb ALL strategy games in one mod
(well, you will need a supercomputer to play this thing but it's still fascinating)
Oh Firaxis, please hear our praies and make this into existence, playable by 32-bit, 2GB, windows XP computers.
A system of stages could be added. For example you start controlling a mesopotamian city as in SoI, and after some conquests the map and time escalation changes, so that you play a game like DoC. After you conquered the world, the escalation re-changes and you play a Final Frontier game. The escalation could also change during battles, so that you play the siege of Constantinople as in Defense mod.
Don't forget to add "backturn" button, which goes back to time and a parallel universe screen, where you see all your saves on a parallel universe tree (for example if you played turn 128 three times, you will see these three different parallel universe lines to pop up from the 127 save).
I'm thinking why not adding a city-building feature like in SimCity... In the final analysis that's the UP of civ4, it can absorb ALL strategy games in one mod

Oh Firaxis, please hear our praies and make this into existence, playable by 32-bit, 2GB, windows XP computers.