As for what settings felt most unique to me

Shadow of the colossus A desolate haunting place. The landscape feels so vast, natural and surreal at the same time.

Dark souls The 3D layout is forever etched into my mind, brilliant map design.

The last guardian Yes, I do want to crawl all over this mysterious place. I felt regret every time Trico broke stuff, preserve this magnificent place!

Grim Fandango Mexican folklore in noir detective style with great music and humor, such a unique experience.

Blade runner My feelings for this game are most likely strongly influenced by the movie, which set the tone for the game.

Unreal It definitely lived up to its name, it all felt very unreal.

Outcast Unfortunately the difficulty didn't let me get far, yet what I saw of the game was unique.

Half Life, Metroid Prime, Street Fighter II, Mario 64. Also Legend of Zelda, but I didn't actually like it.

Crash Bandicoot 3: Set my basic standards when it comes to 3D platformers.

Team Fortress 2: First online multiplayer game I got heavily invested into.

Dark Souls: Made me change how I tackle games in general and forces me to pay more attention.

Breath of the Wild: Convinced me that games have endless possibilities and it's possible to do almost anything.

Persona 4 and 5: Flat out made me try to improve my social life and talk with people more often.

-Shadow of the Colossus - Everything about it felt unique: the atmosphere, the sense of mistery, the whole concept of the colossus, its subtle way of storytelling, dat ending.
-Zelda: Ocarina of Time - The first time I had contact with this game was seeing a cousin playing it and it looked so magical and mysterious. When I first played it myself, it completely blowed me away.
-Super Mario 64 - The first 3D Mario I played and I loved the sense of freedom and adventure.
-Zelda: Majora's Mask - The time system made it one of the most unique games I've ever played. I loved how the npc's felt really fleshed-out. The bigger focus on side-quests was amazing, as well as the more personal story and the darker atmosphere.
-Kingdom Hearts 2 - It may sound weird but this was actually my first Kingdom Hearts game so the whole thing of travelling across Disney worlds blowed me away.
-Chrono Trigger - This game is not that different from other games of the same era, but the time travelling took it to another level of epicness.
-Xenoblade Chronicles - This game's scope and variety of environments was something really impressive for me.
-The World ends with you - The combat in this game is one of the most original combat systems I've seen.

Super Metroid may have been my first unique gaming experience. Never played anything like it, nothing close as atmospheric and interesting and compelling on a level from the Mario and Zelda games.

FF7 was my first and favorite FF and to this day it's still incredibly unique from the narrative structure, to the characters, and the soundtrack.

Super Mario RPG was my first turn based game. And even now the art style defines it and separates it from any other game I have played (in a good way). No random encounter, the enemies all on screen

Persona 4 was an entirely different take on the JRPG formula. Socializing as a form of RPG gameplay in a limited but very ever changing area over time.

Perhaps, although I can't say I've been successful with that.

Black and white 2, Super Mario 64, Link to the Past, Duck Hunt, Ocarina of Time, Majora's Mask, Mario and Luigi Superstar Saga, Diddy Kong Racing, Goldeneye, Sims, Morrowind, Super Mario World 1, Super Mario World 2, Super Mario Brothers 3, Super Mario Galaxy, Breath of the Wild, Pokémon red, Starfox 64, Metroid Prime, Starcraft

The WII