While we have ways to play locally, the official TTS hotseat mode has bugs that make it unusable at present.

Follow these steps to play locally using an extra mod.

I've put full instructions into a youtube video (turn on captions to see the steps): https://youtu.be/NHw-jdso8Jc
The Hotseat Buttons mod you need to subscribe to is https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2061538697

•Subscribe to this mod and the Hotseat Buttons mod linked above.
•Start a SINGLE PLAYER game
•Click the GAMES button, find the Hotseat Buttons mod and click the 3 dot menu and "Search". •Drag in the bag of buttons, or individual coloured buttons that you want from that mod as per the video.

•Click any button twice will make it that players turn, revealing that player's hand and hidden zone on screen.
•Click the active colour's button once will end the current turn and hide all hidden zones and hands. Then click any button once to make it that players turn, revealing that player's hand.