How do you unlock trade routes ?

[Khebeln]

How do you unlock trade routes ?

So far its feels random what trade route unlocks.

Is there any way to control what and when to unlock more trade routes ?

Game dont explain it at all.

[**SMASH**]

I think you buy them once you get the right service building.

[Mr_H4ndy]

Yes, you can unlock trade routes thanks to the Macellum (Service Building)!