Ultima VII: the Black Gate
Quest Designer, cd Projekt red
Man, we are getting in the Wayback Machine for this one. A game I absolutely love is Ultima VII. It was, in many ways, the first open-world game. You can go out and go absolutely anywhere and, if you know where you are going, you can beat the game in about 15 minutes. It also had a level of immersion that is, to my mind, still almost unmatched. I very rarely see many games that have that level of interactivity with the world and you can see a lot of its influence through the Witcher 3: Wild hunt and you are going to see it again in cyberpunk 2077.
I know that for sure because, were you to ask one of our game directors, Ultima VII would be his answer too!