Firstly I would like to say that the Devs have done an amazing job developing such an amazing game. I would also like to point out that I am not criticizing the Devs, (I only point that out because when I have made suggestions for other games people have said that I don’t appreciate the Devs and I should not criticize their work).
Next, I do not want to take any credit for this suggestion, as I do not know if it has been made before, and because one of my friends came up with this suggestion and I am just trying to bring awareness to the fact.
We (My friend and I) believe that there should be a multiplayer mode to the game. We have come up with 2 different suggestions:
A cooperative world in which players can build together.
A challenge mode, were players are given a challenge and have to complete it before the other person.
We have also come up with a few ideas for different challenges:
i) Players have to reach a certain point on the tech tree. (e.g. Players need to unlock uranium mineing)
ii) Players need to attain a certain population. (e.g. Players need to reach a population of 1,000)
iii) Players need to obtain a certain number of a certain level of citizen. (e.g. Players need to get 125 level 3 citizens)
Finally I would like to reiterate how much I apricate the Devs, and all the hard work they have done.