If charged-bow aiming is your focus, start with Breath Control; its effect extends steady aim time on charged shots, and the guide lists no prerequisite.
If crafting materials are your focus, compare Naturalist and Survivalist to see how the guide distinguishes natural from man-made resources gathered from each source.
If you are following handheld-explosive skills, compare the gas-can and radio crafting options with the skill that increases crafted handheld items’ detonation radius.
The guide states that tier II unlocks after spending eight skills and tier III after spending nineteen. Tiered skills may also have their own specific skill or weapon prerequisites.
The crafting passage says handheld explosives require the relevant skills and the appropriate item in hand, using a bottle for a Molotov Cocktail as an example. It says Body Traps can only be crafted near a fallen enemy.
Selected systems and editions described by the linked references.
Edition and mechanic limits
The crafting source flags its article as needing improvement and says costs are missing for some items. Exact resource quantities, comprehensive equipment upgrades, and comparative effectiveness are not established here.
