As you might expect from a 4X strategy game based on Frank Herbert's Dune, spice is a very important resource that you'll have to locate, and manage. Dealing with spice and the spice market is something you'll have to do throughout the entire game, and it's a mechanic ripe for exploitation.
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The spice market is likely going to be your primary source of income, but it's something that fluctuates a lot. In addition, you have the ever-changing Imperial Tax to deal with, so it's not like spice is something you can ignore once you've got a few sources.
Obtaining spice is a simple matter of exploring the surface of Arrakis for purple deposits of the resource. You can identify them by the icon that looks like a mound of purple dust.
To actually harvest this spice, you'll need to take over a village in the same region and construct a Refinery in it. Refineries have some Solari and Plascrete upkeep costs, but the spice you'll get from the Harvesters produced by the Refinery will outweigh the costs.
Make sure you enable Auto-Recall on your Harvesters. This will reduce their spice harvesting by a measly five percent in exchange for automatically recalling them whenever they're threatened by a sandworm. Sure, you'll have to manually redeploy them, but you'd have to do that anyway and it's worth not having to worry about your Harvesters and any Crew they have working on them.
You can improve your Harvesters by adding Crew to them. To do this, click the Add Crew button on the upper-right corner of the menu when you have a Harvester selected. Hiring a Crew member has a one-time cost of 50 Manpower, but does not have any upkeep costs.
Once you have a source of spice being
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