H.E.R.O.
Atari 2600
Vintage gaming community.
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H.E.R.O.
Atari 2600
It just barely makes the cut off since it came out in 99, but Sid Meier's Alpha Centauri is my favorite strategy game of all time. It even managed to get a Linux port and you can get it on GOG. I was excited when Civ: Beyond Earth was announced that it would be a true successor, but sadly it wasn't even close.
Legacy of the Wizard - NES aka Dragon Slayer IV Drasle Family - MSX
Castlevania: Symphony of the Night
Edit: nevermind, this was already posted. I literally did a search on the page first and it didn't match for some reason.
I noticed that problem on mobile, it doesn't load all of tge comments i don't think.
Galaga
Zork
Freelancer, PC
A great pick, but it's not 25yo yet, tho
Thief (1998)
Suikoden
I am very sad that I've scrolled several pages and haven't seen the obvious one (though I could just be blind):
Deus Ex.
Edit: or perhaps it's because Deus Ex is from 2000 and I don't know if it counts yet. Maybe I'll wait 'til next year!
Dance Dance Revolution.
(Do you feel old now?)
Sonic the Hedgehog 2 - Mega Drive
My first game ever.. good times
Final Fantasy Tactics