Meaning it contains easily-accessable info not just on mechanics, but on lore and worldbuilding stuff.
A top contender in my mind is Mass Effect, which gives a whole lot of info never directly presented in the story. However, scrolling through it is terribly boring to the point some of the entries necessitated VO.
On the other end, FFXVI had active-time lore where you could pause a cutscene to see info about all the people and places named, which was a huge boon, especially after long breaks between sessions. However, outside of that system, the actual lore isn’t compiled all that nicely imo.
What are your favorites? Do you prefer in-depth entries? Ease of access? Slick presentation? I want to know your thoughts!