Looking For a Old FPS for PC

[Shock and Awe]

Hey Escapists! Im looking for a old FPS for PC, any recommendations?

It needs to be on steam as well.

I already have,

Half Life
Doom
Duke Nukem 3D
and Counter Strike Source

This thread can also be used for discussing awesome old FPSs in general.

EDIT: By old I mean anything released before 2000, or anything that requires 1.5GHz or less, not that my PC sucks that much, it aint exactly top of the line and I want someting works very easily.

 

[Internet Kraken]

Halo:Combat Evolved.

Or is that not old enough?

 

[Calobi]

Des Ex was good. I've heard rave reviews about the System Shocks, but unfortunately am unsure if they're on Steam.

 

[Shock and Awe]

Halo:Combat Evolved.

Or is that not old enough?

I already have that for Xbox, but thats about as advanced as Im looking, I want something I can run very easily.

 

[Shock and Awe]

Des Ex was good. I've heard rave reviews about the System Shocks, but unfortunately am unsure if they're on Steam.

Deus Ex is there, Ive also heard it was great, so Ill put under consideration.

 

[theSovietConnection]

Outlaws is a fun one, if you can find it.

 

[Hazy]

Far-Cry came out in 2004. Is that old enough?

 

[AbuFace]

Unreal Tournament (the 1999 title) was pretty awesome. Deus Ex is also a must play and the half-life expansions are worth checking into.

All of these games are on steam.

 

[inflamessoilwork]

Day of Defeat, original or source, both great

 

[EnzoHonda]

Des Ex was good. I've heard rave reviews about the System Shocks, but unfortunately am unsure if they're on Steam.

Deus Ex is there, Ive also heard it was great, so Ill put under consideration.

Don't put it under consideration, just get it and start enjoying the greatest story ever told.

 

[SquirrelPants]

Unreal tournament and UT 2004 are both good. Also Shadow Warrior from 3D realms is great, and you can get it for free since it's abandonware.

 

[Nutcase]

Painkiller. See demo on Steam.

 

[Zblade495]

Star Wars: Dark Forces II: Jedi Knight. This was the game I played when I was young (along with HL and AVP)and I loved it. You could also try Thief. It's basically a stealth game only done from first person with a few shooter elements involved.

 

[Andy_Panthro]

Have yourself a little look over at Good Old Games [http://www.gog.com/]. Tons of older FPS games.

including:
Unreal Tournament GOTY Edition [http://www.gog.com/en/gamecard/unreal_tournament_goty]
SHOGO Mobile Armour Division [http://www.gog.com/en/gamecard/shogo_mobile_armor_division]
Far Cry [http://www.gog.com/en/gamecard/far_cry]
Rise of the Triad [http://www.gog.com/en/gamecard/rise_of_the_triad__dark_war]
Kingpin: Life of Crime [http://www.gog.com/en/gamecard/kingpin_life_of_crime]
Unreal 2 [http://www.gog.com/en/gamecard/unreal_2_the_awakening_se]