@Orladan There are solo rules in the provided rulebook. Basically, the supply only starts with 4 of each card. Every deck cycle, you trash one of the supply cards, and you have to win before the supply runs out.

@BURN I used this mod as a base for my own Flip City mod.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1967535933
Instead of flipping cards by replacing them, the cards have two states, making flipping and recycling a bit easier. I also added Wilderness, because why not. If you have a problem with this, just let me know, otherwise just wanted to make sure you were aware.

I found this game on a list for solo games but the number of players here say that it is for four players. Is this game soloable?

I created my own Flip City mod, I use cards in english and portuguese, I used your images for the cards in english, if the there is any problem with that you can PM me and we can talk :D

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=955352970

@igorpard: Yeah, i think at the moment this is the only option. I really wish they could enable double side stacking, but will have to use single one for now. BTW , great mod with flip city you have. Well done ;)

I simply made one-sided cards (you replace card when upgrade it) - http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=469561848