Tips and tricks on building zip line network tips if you are playing on difficulty below hard and or you don t plan on doing any extras outside of story you may not need to worry too much any of these but it s nice to consider some of the below in case other porters rely on your zipline structures. Cities distribution centers and other locations can promptly run out of materials if you re. If you want to construct roads with an auto paver you re really going to need a lot of materials.