Questions about the game

1. I'm having trouble understanding the flow. The main game is single player, and the goal is to build a portal to get to the next world?
   → Yes.

2. Do you have to go through multiple worlds to complete the tech tree?
   → No.

3. Does it reset everything (or everything but your tech tree) and act like a new more difficult playthrough with each world?
   → I resets:
   • the [experience level](https://crafttheworld.gamepedia.com/Level_(Experience\)) to 1
   • the tech tree entirely except the auto unlocked techs
   • everyting on your stockpile

4. The base game has a multiplayer mode but it's not a whole playthrough it's just a short skirmish type thing that lets you take resources back to your single player playthrough?
   → Yes. It's called biomes, expeditions, fake/beta multiplayer. Devs have created it before they launch the payed Multiplayer DLC. It has several limitations if compared to the DLC, but also many things that the Multiplayer with DLC does not cover.

5. Is that the same for co-op and verses?
   → If these things haven't changed recently, the biomes are the only way to play against another player. All multiplayer games with the DLC are coop. Tip: do not try PvP with a random player, because they will quit as soon as you have any advantage. The game does not have a system to punish them, nor a way to reward the winner in these cases. Try it with a friend instead.

6. Does it use the tech that you've researched so far in your main play through?
   → IRC, everything is unlocked, but your stockpile starts emtpy.

7. Do people who join your multiplayer game use your tech level or do the use the tech they've researched so far messing you both have different tech levels?
   → Shared tech tree only exists in Multiplayer with DLC. And this aspect of the DLC was very buggy sometime ago. Not sure how it's now.

8. If so, does this make multiplayer difficult when playing with someone who wasn't as far as you in the single player game?
   → N/A

9. It sounds like in the multiplayer DLC you can't take the portal at the end.
   → Confusion here. You do not "take" the portal, because there is no "next" level in DLC multiplayer. But you do have to complete a portal with 11 pieces.

10. Does a single world give you enough time to research the entire tech tree and to experience the game in full or do you need a single player playthrough to do that?
    → In general it's like the campaign: you do not have to research the entire tech tree to finish the world. You need most of it to fight against the bosses. The major difference in MP is that some of your partners will rush to finish it, more like speedrunners, while others will take their time doing whatever they want (full tech tree, high skilled dwarfs, beautiful base, etc.)

11. Does your Digging With Friends DLC game also help your single player playthrough?
    → It helps in all instances of the game: campaign, custom, biome and DLC multiplayer. But in DLC multiplayer you coop partner wont be able to have, craft nor place the SiA items. They will see them in the world and profit from their benefits, like pets defending the base.

12. It seems like when DLC unlocks something, only the person with that DLC can make that equipment or use that tech in the multiplayer game. But what happens if only the person hosting has the grottoes DLC, can everyone experience those areas?
    → Idk.

13. It almost seems like the grottoes spawn no matter what, does this mean only those with the DLC can go into them?
    → Idk.

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Wow these are good questions. I have just messed around with the single player mode. That first section of questions is good. I will be watching this thread because I want to know the answers too!