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the game is still in early access, so only standard crafting recipes are in game at the moment.
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skills/skill trees are still being worked on, but an initial pass of the proposed implementation should be released within the next few updates.
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slingbow is currently the only weapon in game. The lance will make its debut soon.
Edit: …and of course, welcome back! (sorry was hard pressed on time before, so wanted to get the information across as quickly as possible during my tea break 
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… and thanks to James for fixing my link!