How to unlock a plant, animal or mineral
When hovering over the next upgrade for a resource it says: "This animal is still locked! Try to develop humans differently to unlock it."
What are you suppose to do to unlock the next tier?
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GTA 5 - Peyote Plants Location Guide (Play as an Animal)
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Images: Brett Sayles, Brett Sayles, Tomáš Malík, Tomáš Malík