Yes, pop-ups are very instrusive. What about loading screens with game tips and/or scientific facts that helped development?
No fact is 100% reality proof, especially in Humanities. Still, the archaeo-history-specialist subforum has constituted a bibliography, so we have names to back facts up 
Hey everyone! I wanted to show you the work of a YouTuber who does History vulgarization, Nota Bene. He paired with a TV channel to produce “History’s Creed”, a 10-episode series where he mixes his two passions, History and video games. Even if the whole series is very interesting, I wanted to show you guys a specific episode. It talks about history consultants and of the difficulties of matching gameplay and historical accuracy. It’s quite short and mainly opposes the view of Warhorse Studios (Kingdom Come: Deliverance) and Ubisoft (Assassin’s Creed series), so I’d advise you to take a look and maybe comment it here In my opinion, something is overlooked: the possibility to extract gameplay from realism… Well, you can make up your mind here (subtitles available in english, spanish, german and polish):
https://www.arte.tv/en/videos/074699-005-A/history-s-creed-5-10/
