Most of it is through time. (I only record what I have read. There are a lot of articles that I only read at the beginning and then abandoned.) Just because I don't like the book doesn't mean it's not good.
The second story is about the Zerg.
The story was mediocre, but the book was pretty good.
Unit text, the protagonist of each story is different, there are only eternal 66 and the main system.
I haven't finished the story and I haven't read it yet. I don't know what happens after 66.
I think the first story is quite interesting. If you accept the large writing style, you can choose stories to read (the Western Fantasy story looked like it was not time travel at the beginning, so I skipped it)