For me it was definitely DOOM 2! Miles ahead of anything else I had played before.
Morrowind, by far. I still remember the sense of freedom and exploration I got
Also Morrowind. The systems of that game blew my young mind, and I was far too dumb to notice most of the jank.
I was too young for Morrowind and started at Oblivion, but yeah, it’s the Elder Scrolls games 100%. At the time, to me (age ~9), gaming was jumping and gunning around blocky worlds full of fake doors and imagining how cool it would be if GTA felt like an actual world instead of a blocked-out setpiece full of people whose only thoughts were to walk around, drive, or fight each other.
I started Oblivion and it was insane. I could go in nearly every house, I could have conversations with everyone, I could walk around picking up whatever objects and stealing stuff, then break out of jail when I got caught, I could get inducted into an assassination cult (even if I was really bad at lockpicking and struggled to get in the front door), etc. It was mindblowing and those sorts of features are why I prefer Bethesda titles even to these major titles everyone loves like Witcher 3.
Same. One of my friend’s dad played all the old school DnD games and what not. I remember going over one day and seeing him play that, and when I asked him he was showing me a bunch of things with the open world and the characters. As soon as I was able to get it, I did, and I put in so much time into that game.
Duke Nukem 3D.
Yeah, Wolfenstein 3d and DOOM were great but Duke 3D was some next level shit. Being able to take a leak at the urinal was so cool.
I remember getting my first 2 computers connected over 10base2 LAN with T connectors and terminators and all that stuff just so me and my brother could play duke nukem 3d. It was awesome. I also remember one of the computers could barely run it and then only if shrinking the screen down. If more than 3 laser trip bombs went off at once… instant slideshow.
Has to be portal
My first? Probably roller-coaster tycoon. I was amazed how big and intricate the would could be, and all these coasters and everything were running at once. Led to other things like Sim city and such to find more world building games.
Myst has always stuck with me as looking amazing at the time. I totally sucked at the game but its graphics have a fond place in my mind for some reason!