What are your favorite old school games besides Doom, Quake, Duke etc

There are certain games that pretty much made the 90's era what it is, like Doom, Duke Nukem 3D, heretic, Quake and so on forth. But besides those obvious classics, what are your favorite games form the 90's?

There are a handful of games I can think about like Raptor (a fighter arcade game from the 90's.), but I don't really have that many ideas. Do you know about any truly classic games from the 90's that stand the test of time?

Also note that "classic games" does not mean "sold well", but rather how good they were and how they stand the test of time. As long as the game was very good and is still very good, it's worth mentioning.

Do you know about any great games from the 90's besides the obvious examples like Doom, Heretic, Duke 3D etc?

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I believe Shadow Warrior still stands as an excellent mid-late 90s game.

The super mario games.

For the sake of brevity, I'll limit this to DOS games.

Indy Car Racing
Carmageddon
The 7th Guest
Terminal Velocity
Descent
Dune 2
Full Throttle
Acid Tetris

Out of all of those, I probably got the most playtime out of Carmageddon. It's a formula that really can't go wrong... even TDR 3000 was OK.

One Must Fall 2097. Perhaps the best PC exclusive fighting game ever made.

What is the cutoff date for "oldschool" here? Is anything 6th gen acceptable? Because even the 5th gen was considered retro during the 7th gen. Besides, 6th gen games feel very different than the stuff that comes out now.

If 6th gen is acceptable:
*Wario Land 4 - Childhood favorite of mine, just started replaying it.
*Jak and Daxter trilogy - Another childhood favorite. I always liked the character design, the world, gameplay, atmosphere and music.
*Halo 1/2 - Many fun nights of local multiplayer. It's also neat to know the process that went into many of the single player levels, as I'm loose acquaintances with one of the level artists, who these days works on mobile games that aim to be real games targeted at a more dedicated crowd, a opposed to crappy throwaway minigame titles like Angry Birds.
*Timesplitters 3 - More local multiplayer fun. Probably the first game I made levels for, though they were kinda bland (one was a symmetrical maze).

Older stuff:
*Marathon trilogy - I actually think this game holds up pretty well. It's certainly not the most accessible series, and the first game does have some questionable level design choices, but I honestly think that aside from Colony Ship for Sale, all you need is patience to appreciate this game's quality. The second game doesn't really pull any bullshit, and the third still has good level design but demands some serious dedication to get anywhere.
*M.C Kids/McDonaldland - A top-notch Mario clone. Well designed levels, deep exploration, good controls, catchy music. Only real complaints of mine are that there is no save feature, and the ports to other platforms seem to use completely different (and bad) player physics. A shame, the Amiga version would've been my preferred version if not for that.
*Thief 1/2 - Amazing stealth games. Great audio, atmosphere and level design. Total freedom and immersion.

- EarthBound
- Mega Man
- the Commander Keen games

I have quite an expansive list.

Hmm...

Well, i've played:

- Dangerous Dave games
- Carmageddon
- Dune 2000
- Half-Life 1 (does that count as classic yet?)
- Corridor 7 (Wolf3D clone with stationary ammo panels and an automap)

Crasger said:

- the Commander Keen games

Yeah, that too ;)

Sky Roads

I'ma also limit this to DOS/early Windows games:
Terminal Velocity
Bio-Menace
Pyro 2
Sopwith
Jet Fighter II
Arcade Volleyball (wonder if anyone even remembers that one)
Kiloblaster
Ack Ack Attack
Tank Wars/Scorched Earth (basically the same game, each has its charm)
Spectre VR
Destruction Derby

Eh, I'm probably leaving some games off the list, but I think this is a good round-up.

Baldur's Gate

Fallout 2

Planescape Torment

Daggerfall

Street Fighter
Street Fighter II
Super Street Fighter II X
Street Fighter Alpha III
Street Fighter III:New Generation
Marvel vs. Capcom and 2
Metal Slug up to 3
Art of Fighting 1,2,3
Fatal Fury(all of them)
King of Fighters up to 2000
Shadow Warrior
Powerslave
Po'Ed
Armored Core and its expansions
Tekken up to 4
Street Fighter EX 1,2,3
Mortal Kombat up to UMK3
Every Castlevania up to Symphony of the Night
King's Field 1,2,3
M.U.G.E.N
Blood
Contra up to 3
All Duke Nukem 3rd person shooters
Heretic & II and Hexen & II

Diablo & Baldur's Gate.

Chasm: The Rift
Dark Forces
Dark Forces II
Pokemon Crystal
Mortal Kombat I-UMK3
Shadow Warrior
PowerSlave
Blood

ok here are a few I love-

>legend of zelda: link to the past
>fur fighters. A cute cartoony third person shooter on sega dreamcast, fun game.
>MDK2. A hard third person shooter that I have on dreamcast and PC.
>Earthbound
>Crazy taxi 2. Favorite game on dreamcast.
>hexen 2
>any of the contra games
>tfw can't green text on doomworld.

Carmageddon
Blood
Hexen
Planescape Torment
System Shock 2
Rainbow Six:Rogue Spear
Broken Sword
Discworld 2
Unreal Tournament
Outcast
Omikron:The Nomad Soul
Kingpin
SiN
Urban Chaos
Aliens vs Predator (1999 version)
Dungeon Keeper 2