Ok so I've been thinking since I saw this post last night.
There were 2 games which I had in mind: Dark Souls and The Elder Scrolls V: Skyrim because I think those are the two games in which I've spent way too much time, the latter being the one I've played the most. (wink wink)
If that last line didn't give you a heads up of which game dipped my head fully into it's Lore, World and Characters, then I'll tell you. It's a game I would love to go back even on this day, It's The Elder Scrolls V: Skyrim. And here's why.
Source
I first got introduced into what Skyrim was in 2012, some months after it came out. I had been watching countless videos and gameplay series about it and I was so hyped that Skyrim was the only thing I wanted to talk about when I was in school back then (9th grade). Later down that year, a friend gifted me his copy of Skyrim and I was so SHOOK that I didn't even remember what else happened on that day until I got home and inserted the disc onto my 360.
To this day I could keep playing skyrim without getting tired (The disc got damaged before I could install it) and even more with all of the DLC's and mods that exist today. But sadly I don't own it on PC.
The things that captivated 13 year old Volderhein about Skyrim, were: The openness of the world. I had never played an open world game like this with Rpg elements, dumb puzzles and somewhat entertaining combat. Back then I thought that this was the best game ever created, EVER. The fact that I could kill almost anyone, go anywhere I wanted and the variety of weapons, armors and spells were just the best thing I had ever seen back then! The Soundtrack. Have you ever listened to it? It's one of the most relaxing and immersing pieces of OST ever created. It blends pristinely into the traversing of the world and the combat and the exploring and it's just simply perfect for the Adventure. The Lore. DO YOU KNOW HOW MUCH LORE IS INTO THIS GAME? THERE'S APROXIMATELY 5 GAME'S CONTENT OF LORE IN HERE. AND I HAVE PROBABLY READ ABOUT IT. I've honestly felt like I've learned about 3 life's worth of history knowledge since I got into Skyrim.
Although the game looks like a clunky mess because of today standards in the industry, it still holds a dear place in my heart and it will stay there forever. In 2012 this was the best gaming experience and worldbuilding that I had ever experienced. All of these things plus the exploration and the characters make me 100% immersed in Skyrim whenever I pick it up. It's just so easy to get lost into it's world and the roleplaying of your character. I will never regret going back to it because I can always say that I took an arrow in the knee.