RPGs have always been my favorite type of video games. The very first RPG that I really loved was The Elder Scrolls IV: Oblivion. At the time, it was the most realistic, immersing video game I had ever played (though it certainly doesn't meet those standards compared to today's video games). It felt incredible to explore an entirely different reality, where the possibilities seemed endless. That was about 6 or 7 years ago, and I still play that game to this day.
Of course, I don't play it as much as I did when I first discovered it, but every time I do play, there's still so many adventures left to explore and quests to complete. Most people are only familiar with The Elder Scrolls V: Skyrim, which is undoubtedly a good game. However, in my opinion, it doesn't begin to compare to Oblivion. With Oblivion, there are hundreds of quests to discover, each one with it's own interesting story and diverse characters. Compared to the quests available in Skyrim, the ones in Oblivion are so much more creative and detailed.
In conclusion, I'd say the game that continues to blow my mind after years of gameplay is without a doubt The Elder Scrolls IV: Oblivion. Though its graphics may not come to par with those of today's video games, the amount of gameplay and lore you get out of it more than makes up for it's appearance. If you want an escape from reality that will maintain its charm and magnificence for years to come, I strongly recommend this game.