Final Fantasy III (AKA FF VI) for SNES. Was probably 11 or 12. First time I got those bittersweet "that was so amazing/I can't believe it's over" feels.
Hmmm... Maybe I'd regret this later, but for the way my career panned out I would certainly take all those points I spent on Grindcore Drumming and dump them directly into Math. 🤷♂️
Want weird (not good, per se, but weird)? E.Y.E. Divine Cybermancy might be worth picking up on sale. Also I don't think anyone mentioned Space hulk Deathwing.
I have by far the most hours in Skyrim as a single game and Total War as a series, but my all time favorite would probaby have to be xcom. 2012 first, then xcom 2, OG, Apoc, and TFTD last.
Total War: Attila took me a good 10 restarts over the past 4 years before I finally felt like I hadn't totally borked my empire by turn 20. Think I'm finally on the path to victory now, though.
AI War is a game I want so badly to understand and eventually master, but damn if it isn't neigh...