Dead multiplayer games on Steam?

Both Black Ops are dead.

Starvoid is pretty dead I think ^^

Tower Wars 1v1 is ok, but searching for a 2v2 game can take a couple of hours ...

Call of Duty 2. Although COD 4 is very alive. For COD 2 the most amount of people who ever played it was around 35 people.

Street Fighter x Tekken. Dead fighting game. :(

Grid 2

Special Forces: Team X. Its a shame that servers got to desert-like point so quickly because the game was so much fun, but almost noone bought it.

Far Cry 3

Tryst

Plain Sight

Pretty much the whole Men of War™ series!

FEAR 3...

Guardians of Middle-Earth - needs 1-2 hours to even find a 3on3 match, 5on5 is impossible.
Poolnation - Really new game, but I never managed to find another player to play with me. When I find a lobby, well, thhats 1 time in a week or so.

I love The Ship... and I wish I could help with the Red Orchestra things... xD

Starvoid.. I loved that game. :(

Battle Fields 4

World in Conflict, Dino D-Day, FEAR 3, TFC, EYE Divine Cybermancy and vanilla Jedi Academy.

I'm still sad at how Nuclear Dawn ended up. I love that game, it's super fun. I still play it occasionally, but you're lucky to have 10 people online at the same time.
edit
maybe I just play at the wrong times, seems like 12:00 there's usually a decent population (25-50) according to steamcharts. Sadly, I'm usually at work at 12:00. Oh well

Nexuiz

liked the game but it never got fixed and now its removed from steam mp was dead long ago back when the game was still purchasable on steam.

Ravaged!!! It's not exactly dead yet - i played a match with 14 players yesterday but there are evenings where nobody plays it...
But it seriously needs a push. And basically everybody and his brother owns this game.
Here is a group that aims to revive it.
http://steamcommunity.com/groups/SaveRavaged

Also: The Showdown Effect!

tdu

COUNTER STRIKE CONDITION ZERO
only good server out there is xxlgamers.
the assault map is DEAD im hoping they revive it, everyones too busy playing dust2

Bloody good time

Brütal Legend