So I'm gunning for the 10 sidequests completed achievement and when I look at my general stats I realize that it says I only have completed 3 sidequests. I am pretty far into the game and about 50 hours in so I find it hard to believe. I haven't been able to find an answer to this but what exactly counts as a sidequest? I figured it was anything that is in your quest log that is not part of the main story or under misc.
Do sidequests only count if you finish a whole branch? Like does completing all of the Dark Brotherhood quests count as one sidequest?