When I was young and had a super nintendo I loved playing Super Mario RPG.
I’m playing the remake and I’m at the scene after defeating Valentina. Mallow goes into the castle and Mario was left standing outside.
Back then I didn’t know why Mario pulled out an umbrella and it rained. I just realised after 20 years of playing the original that Mario knew it was going to rain because whenever Mallow cries it rains; Mario knew that Mallow would get all emotional when meeting his parents for the first time.
Blew my mind.
That’s the second, and only if you only count the modern games. First modern game was The Stick of Truth, first game ever was South Park: The Game on the N64 iirc.