Updates for Counter-Strike: Source, Day of Defeat: Source, Half-Life Deathmatch: Source, Half-Life 2: Deathmatch, and the Source SDK 2013 Base have been released. The updates will be applied automatically when you restart the game. The major changes include:

-Fixed physics not operating at the correct tickrate when specifying non-standard -tickrate options on the command line
-Fixed viewing demos recorded at a non-standard tickrate causing the next listen server hosted to be at that tickrate... [read more]

http://www.youtube.com/watch?v=5H2rL-lBxRs

Courtesy of Nathan Andrews on YouTube:

Video created by: Nathan Andrews
Edited by: Andrea Andrews

I've added full head tracking and weapon tracking to Half-Life 2 in preparation for the Oculus Rift dev kit launch. Once the official rift apis are available I'll integrate them, giving people ~70 hours of content (this also works for episode 1 & 2, the lost coast and tons of user generated maps, etc) that they can use to test out their Rift.

This video shows a handful of scenes of me ... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Fixed a bug in SourceTV that would sometimes corrupt demo data

Team Fortress 2
Cow Mangler changes
Fixed the charged shot sometimes doing more damage than intended.
Fixed a bug that caused the projectiles to stay in the w... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Updated the localization files

Team Fortress 2
Fixed a Linux dedicated server crash caused by the Replay director
Crash would happen whether the server was capturing Replays or not
Fixed the Map Stamps Collection bundle m... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Fixed a Linux dedicated server crash in vphysics.so
Get the full article at store.steampowered.com

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Reduced CPU usage for idle servers

Team Fortress 2
Added the Splendid Screen, Ali Baba's Wee Booties, and the Mantreads to the whitelist for Medieval mode
Added a server console message when a player is sent to the server... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Updated the shared interfaces for the TF2 Free To Play update
Updated the shared localization files

Team Fortress 2
TF2 is now Free To Play
Added the Uber Update: http://www.teamfortress.com/uberupdate/
Added PL_Barnblitz, a new Payload map
Added all kinds of ... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Fixed a client crash when disconnecting from servers with sv_pure set to 1
Fixed a client crash in the material system
Fixed a client crash caused by using alt-tab while playing

Team Fortress 2
Added the Concheror and the... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source Engine Changes (CS:S, DoD:S, TF2, HL2:DM)
Fixed another case where the $ignorez material flag could be used as a cheat

Team Fortress 2
Extended the Saxxy contest deadline to 11:59:59 PM GMT, Friday, May 20th, 2011
Fixed the third-person camera options dialog not ... [read more]

Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Important notes
If you were previously crashing on startup, please have Steam verify the integrity of your game cache
Update your game to the most current version
Right-click on the game and select "Properties"
Click on the "Local Files" tab
Click on the "Verify Integrit... [read more]