I grew up with DOS games - Commander Keen, Wolfenstein 3D, Defender of the Crown, Hanse, Strike Commander and Wing Commander, Aces of the Pacific, Flight Simulator 3, Stunts3D, Hot Rod - Those are the games that showed me what unlimited amount of worlds can be inside of a computer. System Shock 1 didn’t hook me (but the remake has), first time playing System Shock 2 and Thief blew my mind.