Ok .. it would be nice to play with others .. but sometimes you can only game when you can not when you want to …
SO … how to play with your self as if you have friends ..
This is a long way to play and this game play will last you years ..
First off you have to set rules for your self .. i wont tell you what those are as you get to set your fun ..
Play with out killing bosses … try get iron … if you die .. start a new hero and new map .. try to get iron with out killing bosses ..
Do this game style a few times…
Once you have gotten iron ..
Take all of your heroes .. and put them in each others main base …
Now with the main bases ocupid with your heroes .. move items around your main bases … stock your kitchen .. stock your work room .. gather your stone and wood to one location from all the main bases …
NOW that you have combined your worlds … go kill bosses ..
When you combine your games it will feel like you are playing with the horsepower of playing with others …
Source: https://www.reddit.com/r/valheim/comments/1136472/how_to_play_as_if_you_are_playing_with_friends/