Hard to pick one but if I had to I'd go with Final Fantasy VII since it was the game that got me into RPGs, and I got some good memories of watching my brother play it when we were kids.
My favorite games as a child growing up in the 90s:
Zelda OoT
Super Mario 64
Pokemon Red
Zelda OoA/OoS
Though after later playing Final Fantasy 7 in 2003 that quickly captivated me and became really special to me. It was my first Final Fantasy I ever played and one of my most cherished games to this day.
Also, while I never played the original 90s game, I absolutely adored Black Mesa and the Half Life franchise. It was damn impressive what Valve accomplished with the original Half Life back then.
Fallout. I'm yet to play the second part and people say it's even better.
You just don't see such game design anymore, I can't say modern or old one is better, both have their advantages but playing Fallout was totally worth it
Man that's a tough one. The 90s covered a huge spectrum of games and consoles.
Perhaps at the time, Final Fantasy VII was my favorite. No other game absorbed me like it did. I spent so much time playing it. But it's aged badly now.
But as far as games that I would still go back and play? I'd say probably twisted metal 2. The game is just so good. The music, the characters, the vibe of the game.
There is a shocking lack of Star Control 2 in here. Easily the best game I have ever played, period. It frequently gets name dropped in lists of game developers' favorite games of all time. Later space epics like Mass Effect stood on Star Control 2's shoulders to reach the heights they did.
Good news! The devs released it to the open source community under the name The Ur-Quan Masters. You can play it now for free! And they're developing a sequel as we speak over at Pistol Shrimp Games
I got it working on Linux just so I could play it on steam deck. Side bonus! It's so old integrated graphics can more than handle it at modern resolutions. I put that game on every laptop I own.
Old business machines are great for that purpose, snag one on recycle day, install Nobara, install Elite Force.
One day I'm going to have a dedicated LAN match room exclusively for this game.
For me it is probably a tie between Sid Meier's Civilization and Doom. Both were groundbreaking in their genres and they had immense influence on the type of games I since became interested in playing.
The 90s were peak gaming for me - a lot a creative things were going on, new genres being explored. And we were spoilt for choice with all the blatant piracy.
But if I had to choose one game that really blew me away, that would be Thief.
I don't really know what to pick so I'm going to go with something kind of obscure, "The Adventures of Bouapha: Spooky Castle". The gameplay is a little hard to explain but it kind of plays like Zelda but you can pickup upgrades for your main weapon that allows it to be thrown in many directions and it has sub-weapons that can either be found or dropped by enemies and they have limited ammo.
I actually forgot this game existed until itch recommended me "Hamsandwich", which is a free and open-source collection of updated versions of a bunch of old Hamumu Software games. There are mods available for specific games and it's available for Linux, Windows, MacOS, Android and any other OS/device that can play the online version.
Technically 2000, but Sacrifice. It's still one of the most unique games I've ever played, and is my top wish for a remake/remaster.
It's a hybrid action RPG and RTS, which isn't completely unheard of, but even in its niche genre it's unlike anything else. You play a wizard with a range of both spells and summonable units, which can be ordered around to a limited degree, or more commonly used as a personal escort. Both the units and your own spells are very creative, and the higher level ones can be ridiculously powerful. In a glorious early celebration of terrain deformation, many of the high level spells will create volcanoes, mountains, craters, or even gaping voids in the already surreal landscapes. The story mode is also very weird and funny, with some top level voice actors.
So many amazing games to choose from such as all the D&D based ones, Morrowind, the SimCity ones and the Championship Manager games, but my absolute favorite was Fallout 2 for sure!
I don't think I can choose between games like Alpha Centauri, Marathon, Chrono Trigger, Homeworld, Quake, Counter-Strike (I played the beta in '99, does that count?), not to mention King of Fighters '98, Half-Life, Star Craft... wow it really was the golden era of gaming wasn't it?
Shattered Galaxy, it marketed itself as an mmorpgrts. The depth of gameplay was fantastic. While the graphics look a little dated, I would still play it if there was any server population left.
I loved the game Tomba! 2 The Evil Swine Return, it was creative, intricate, and very far ahead of its time, I would love to see the series get a reboot or a remaster
If 1998 in Japan and 1999 everywhere else is too close to the '00s (and in the context of what SA1 meant for the Sonic franchise I wouldn't blame you,) Sonic CD.
Sid Meier's Colonisation, my 10 year old laptop that I replaced last year only had enough power to play that game and I put so many hours into it when I didn't have access to my main pc. It's just a shame that my new laptop doesn't upscale dosbox the same way my old one did but I think that's just because of the differences between MacOS and Windows.
Titanic: Adventure out of Time
The game had quite the ambiance (Smethelles awkward FMV face & that haunting D deck music still haunts my dreams sometimes). In addition, I really liked the laid back mystery solving gameplay that it provided... I feel like it was pretty unique and haven't found anything that quite scratches that same itch.
I tried Project 1999 for Everquest, but the change in culture from 1999 to now is just...a lot. I'd enjoy it again if I could get my friends to play, but I think it'll be too old school for everyone.
So unfortunately I didn't play video games until about 2001 when I turned 5 and got an N64 for my first Christmas in the USA. The game itself is from 2000 though.
Mickey's Speedway USA for the N64.
Goddamn I loved that game. I have so many fun memories with it.
A lot of the greats have already been mentioned by others, but Myst (1993) and Riven (1997) deserve to be up there.
Not only for the immersive worlds you got to experience through masterfully crafted imagery, sound and music, but also combined they held the record for best selling game series until they were surpassed by The Sims.
The entire Dreamcast catalog. Specifically Skies of Arcadia, Power Stone 2, Crazy Taxi, Sonic Adventure 2, Berserk: Gut's Rage, Spawn: In the Demons Hand, Phantasy Star Online, and so many more great ones.
Doom 2
Wolf3D
StarCraft
Warcraft 2
Chrono Trigger
F15 Strike Eagle 2 (might be late 80s though)
Super Mario World
Shadowrun (Sega Genesis)
Sonic
Of all those, StarCraft on BattleNet changed my life. What an amazing thing, to play against people from around the world. So it's hard to rank when we're mixing platforms and online and whatnot.