Black Mesa is finaly out (well, 2 weeks ago) after YEARS of developement by some hardcore fans.
It's a Half-Life 1 remake with the engine of Half-Life 2.
The game is on greenlight and won't remain free for ever, I guess.

How to install the game:
1) Go in tool panel and install Source SDK Base 2007 - steam://run/218

2) Download installer and archive (don't extract) from this page - http://www.gamefront.com/black-mesa-is-live-download-it-here/

3) Install then restart steam, so the game will appear in gamelist.

4) Enjoy the best all time fps with new graphics!

In these days off significant event under the name "Madness during week-end will take place!" All interested persons and their friends for reception of achievements Are invited. We play on HOE and Suicidal. Event begins on Saturday evening! 89.223.39.189:7707 the server address (I hope it the correct address xD), you know the password. And those who will not come, follow beer and women for all! With the best regards, your axe of the truth - jp123!

P.s. sometimes i use translator xD

My 2 old mutators are finally on whitelist!
There are no reason to not use them, at least the first one that show the remaining health of patriarch when the squad is wiped out.
The second one is only if you really want to remove a weapon from the game.

Patriarch HP Left:
http://forums.tripwireinteractive.com/showthread.php?t=45256

No Big Guns:
http://forums.tripwireinteractive.com/showthread.php?t=45586

KF-Complex
http://www.moddb.com/games/killing-floor/addons/kf-complex

KF-Asylum
http://www.moddb.com/games/killing-floor/addons/kf-asylum

KF-Distrikt
http://www.moddb.com/games/killing-floor/addons/kf-distrikt

KF-KingOfTheHill
http://pliki.red.orchestra.pl/maps/killingfloor/download/KF-KingOfTheHill.zip

KF-Deep Thrust
http://www.moddb.com/games/killing-floor/addons/kf-deepthrustv1

Kf-DeathPitFinal
http://www.filefactory.com/file/ag2h1cg/n/Kf-DeathPitFinal_rom

KF - Pandoras Box
http://pliki.red.orchestra.pl/maps/killingfloor/download/KF-PandorasBox_v2.zip

KF-Lab106
http://www.4shared.com/file/124098917/35fe42ce/KF-Lab106.html

KFPrisonv1
http://www.megaupload.com/?d=XAINNS8D

TheHiveV1
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=28

KF-CarryOnUp
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=116

KF-SecretPassage
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=32

KF-Penumbra
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=33

kf-wolf
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=43

KF-LostContact
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=37

KF-DarkTunnelsV2
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=46

KF-Floor17
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=103

KF-ScrapHeap
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=223

kf-Killbox
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=50

KF-Refugev2
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=135

KF-StationX
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=138

KF-StorageDepot
http://umh.sandcrawler.net/index.php?page=downloads&command=view&id=1

It seems to me all already original maps of game have bothered. This night I have loaded in addition 16 new maps. Here the list:
KF-Afghanistan
KF-Arcade-Shopping-Center-final
KF-Archives
KF-Brewery
KF-Candlesmoke
KF-Crematorium
KF-Dark TunnelsV2
KF-House-R
KF-Industry
KF-Marshes
KF-Meow
KF-OrmanManor
KF-Stadium
KF-ThelongDarkroad
KF-TheWaterway
KF-West Londonnight_v7

it is possible to download and establish from here:

http://forums.tripwireinteractive.com/showthread.php? t=41919

In addition I can suggest to start a server for game even if I am occupied and I can not play with you. Your offers what maps you are accepted would like that I have loaded.