Counter-Strike: Source - Valve
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 packet injection exploit in the client/server streams
  • Fixed UDP logging exploit
    • Added a new server convar "sv_logsecret" which emits a new S2A_LOGSTRING2 UDP packet to any UDP log targets with the secret value pre-pended

Team Fortress 2
  • Added new map Koth_Badlands
  • Updated CP_Well
    • Spawn room by second cap for each time is now a one-way door
  • Updated Training
    • Added 3 new training courses for the Demoman, Engineer, and Spy
    • Added the Ready for Duty achievement for completing all of the training courses
  • Added a new system to associate dedicated servers with Steam accounts
    • Use the ConCommand "cl_gameserver_create_identity" in the Team Fortress 2 client console to create a server account using the currently logged in Steam account. This will generate values for "tf_server_identity_account_id" and "tf_server_identity_token"
    • Put the values for "tf_server_identity_account_id" and "tf_server_identity_token" into your server.cfg
    • Use the ConCommand "cl_gameserver_list" in the Team Fortress 2 client console to list all of the game server accounts owned by the currently logged in Steam account
  • Added a new system for coaching players
  • Added a new vote system
    • Server convars to control the vote system
      • sv_allow_votes : Allow voting?
      • sv_vote_failure_timer : A vote that fails cannot be voted on again during this period.
      • sv_vote_allow_specators : Allow spectators to vote?
      • sv_vote_issue_changelevel_allowed : Allow votes to change levels?
      • sv_vote_issue_kick_allowed : Allow votes to kick players from the server?
      • sv_vote_issue_nextlevel_allowed : Allow votes to set the next level?
      • sv_vote_issue_nextlevel_allowextend : Allow votes to extend the current map?
      • sv_vote_issue_restart_game_allowed : Allow votes to restart the game?
      • sv_vote_issue_scramble_teams_allowed : Allow votes to scramble the teams?
      • sv_vote_issue_nextlevel_choicesmode : Present players with a list of maps with the lowest playtimes to choose from?
      • sv_vote_kick_ban_duration : How long should a kick vote ban someone from the server? (in minutes)
  • dynamic model loading to improve performance
  • Combat Text changes
    • Added a new convar "hud_combattext_healing" to display the amount of healing done per second
    • Added bonus points to the items displayed using Combat Text
    • Starting position of values is now affected by range to target, making it easier to see numbers when next to targets
  • Updated voice to use the Steam voice codec to improve quality
    • Servers can toggle between the old codec and the new codec with the convar "sv_use_steam_voice", which defaults to 1.
  • Fixed not being able to see the correct colors for painted hats when running with DX8
  • Fixed not being able to see the | character in custom names and descriptions
  • Fixed a couple cases where custom sprays would not import correctly
  • Duel changes
    • The duel dialog has been extended to include class-specific duels in addition to the default duels
    • Duel badges now only show the number of wins a player has
  • Added Payload maps to Offline Practice
  • Fixed taunt kills made with a Katana not counting towards honorbound kills
  • Fixed a bug where killing a Katana wielder with a Katana was incorrectly causing an increased crit chance
  • Fixed infinite noisemakers exploit where noisemakers could continue to be used after their charges had run out
  • Improved the Medic overheal effect so it's more noticeable
  • Fixed func_build entities to respect the team value and prevent the associated team from building in the area
  • Items changes:
    • Added new "Sort by Rarity" option for sorting backpack items
    • Improved the backpack sorting algorithms
    • Added "styles" for the Ghastlier Gibus, Scotsman's Stove Pipe, Treasure Hat, Hat of Undeniable Wealth And Respect, and the Googly Gazer
    • Added paint preview to the preview section when shopping for hats
    • Updated the Googly Gazer to be paintable
    • Added new paint styles to the Pyromancer's Mask
    • Items in the action slot won't be swapped until returning to a supply cabinet
    • Replaced the no-crit attribute with -25% damage on the following:
      • The Eyelander, The Gunslinger, The Southern Hospitality, The Powerjack (also added +20% melee vulnerability)
      • The Horseless Headless Horseman's Headtaker, The Ullapool Caber, The Claidheamohmor
    • Dalokohs Bar
      • Removed item cool down meter and ammo count when using the Dalokohs Bar
    • Fists of Steel
      • Increase deploy times 20%
      • Ranged damage reduced 40% (down from 60%)
    • Loch-n-Load
      • Damage increased by 10%
    • Equalizer
      • Tuned high-end damage range so it's no longer possible to one-shot certain classes
      • Suppress the medic call effect while active
    • Battalion’s Backup
      • Reduced rage generation rate by 50%
    • Concheror
      • Damage-to-health conversion increased to 35% (from 20%)
    • Mad Milk
      • Heal 60% of damage done (down from 75%)
    • Sun-on-a-Stick
      • Base damage lowered slightly but guarantees crits against burning players instead of mini-crits
    • Fan O’ War
      • Marking someone for death now lasts 15 seconds (from 10 seconds)
    • Flaregun
      • Flares always crit burning targets, regardless of range
    • Backburner
      • Removed the restriction on airblast
      • Ammo cost increased 150% (4 blasts at full ammo)
      • Damage bonus reduced to 10% (from 15%)
    • Sydney Sleeper:
      • Charge rate increased 25%
  • Bot changes:
    • Added Spy TFBots. Spy bots have basic cloaking, diguising, sapping, and backstabbing behaviors now, and are ready to join the fight
    • TFBots understand the basics of the Payload scenario now, and will push the cart on offense, and try to stop the cart on defense
    • Added navigation meshes for pl_goldrush, pl_badwater, pl_upward, pl_thundermountain, and pl_hoodoo_final
    • Improved TFBot reactions to cloaked and/or disguised enemy Spies
    • Improved Demoman bot behaviors for planting sticky bomb traps
    • Demoman bots will now try to move to a safe spot and lob stickybombs onto enemy sentry nests to destroy them
    • Soldier bots switch to their shotgun after emptying their rocket launcher at close/medium range
    • TFBots will no longer hide from sapped or carried sentryguns
    • Engineer bots are better at moving their sentry gun nest as the scenario changes
    • Improved Sniper bot algorithm for finding good sniping spots for both Capture Point and Payload scenarios
    • Sniper bots will take opportunistic shots at targets while they move to their desired sniping spot
    • Fixed bug where Sniper bots would sometimes stand around in their spawn room doing nothing.
    • Improved TFBot ability to find a safe vantage spot to attack enemy sentry guns
    • TFBots will no longer try to use a teleporter entrance they can't actually reach
    • Added tf_bot_melee_only cvar. If set to 1, all TFBots will be restricted to only using their melee weapon

Read more about the update here: http://www.teamfortress.com/hatless
Counter-Strike: Source - Valve
Updates to Team Fortress 2 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)
  • Added check to prevent multiplayer servers from transmitting 1 as their maxplayers value to connecting clients
  • Fixed clients being able to use particle exploits on sv_pure servers

Team Fortress 2
  • Added The Shogun Pack items
  • Fixed the "Best Little Slaughterhouse in Texas" Engineer achievement not counting Wranger and Mini-Sentry kills
  • Updated several more models with optimizations and new LODs
  • Updated the Blighted Beak with a creator submitted fix
Counter-Strike: Source - Valve
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 problem with the DirectX8 cloud shader
Garry's Mod - Valve
Updates to Garry's Mod have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Garry's Mod
  • Added HL1:Source NPCs (if you own HL1:Source)
  • Toybox saves can now contain toybox entities and will download them before loading
  • Cleaning the map now cleans brush based entities
  • Fixed map entities respawning over their toybox saved versions
  • Fixed player falling slightly when loading a save
  • Loads downloaded particles automatically, without restart needed
  • Fixed RT camera error when removing your last RT camera
Counter-Strike: Source - Valve
Updates to Team Fortress 2 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 server crash exploit caused by malformed network packets

Team Fortress 2
  • Added three new community maps:
    • Koth_Lakeside
    • PL_Frontier
    • PLR_Nightfall
Counter-Strike: Source - Valve
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 server crash exploit caused by malformed network packets

Counter-Strike: Source
  • Updated De_Inferno
    • Community fixes

Team Fortress 2
  • Fixed the Amputator and the Crusader's Crossbow healing teammates that have the Equalizer as their active weapon
  • Updated the Red team skin for the Fists of Steel
Counter-Strike: Source - Valve
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)
  • Improved the version mismatch error message received when connecting to a server with a different version than your client

Team Fortress 2
  • Made Bill's Hat always tradable.
  • Fixed a client crash caused by a malformed custom client spray.
  • Added a Red team skin to the Fists of Steel.
  • Fixed melee attacks not destroying remote detonation pipes.
  • Added the Rimmed Raincatcher to the list of Unusual hats.
  • Fixed the Stickybomb Launcher viewmodel sleeves using the wrong team colors for team Blue.
  • Fixed players getting set bonuses on tournament servers when the server is restricting the player's weapons using the item_whitelist.
  • Updated PL_Thundermountain
    • Updated the final stage to have the train begin receding after 25 seconds (15 seconds on the final stretch).
Garry's Mod - Valve
Updates to Garry's Mod have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Garry's Mod
  • Players now breathe
  • Players hold their ear while using voicechat
  • Fixed NPC weapons not saving properly in Toybox saves
  • Fixed paint not saving properly in Toybox saves
  • Fixed crash when joining server with corrupt datapack
  • Fixed memory leak in datapack loading
  • Fixed player not drawing in render targets
  • Downloaded fonts are immediately available
  • Fixed player moving when ducking with custom hull sizes
  • Added r_projectedtexture_filter (default 1)
  • NPCs can now fire the crossbow
  • Fixed weapons dissapearing when looking at hated NPC
  • sv_loadingurl can contain %s which will be replaced with the client's steamid
Counter-Strike: Source - Valve
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)
  • Further improved engine handling of server queries.

Team Fortress 2
  • Added Rift promotional items
    • New items: Sun-On-A-Stick and Sharpened Volcano Fragment.
    • New achievement: Riftwalker
  • Updated several more models with optimizations and new LODs.
  • Fixed seeing a partial health bar in the upper left corner of the spectator menu.
  • Fixed the control point progress bar not being aligned properly when using cl_hud_minmode 1.
  • Fixed the The Essential Accessories hiding the Scout's hat/headphones.
  • Updated sounds for the Brass Beast.
  • Updated the Scottish Resistance stickybombs to always glow if they will be detonated by a right-click, including the stickybombs under the Demoman's feet.
  • Changed default crosshair to be more opaque, like the custom crosshairs.
  • Fixed some missing surfaces on the bottom of the Pyro's mask.
  • Fixed the assister's name not being listed in the Fish humiliation and kill notices.
  • Fixed the Force-a-Nature not drawing correctly in the character loadout screen.
  • Engineers who hit teammate's sentry guns with their wrench now get kill assists from that sentry.
  • Made the Jag gift wrappable.
  • Fixed seeing a badge on the player when a noisemaker is equipped.
  • Fixed particle effects on the Hustler's Hallmark.
  • Added FCVAR_DONTRECORD flags to 'bind,' 'bind_mac,' 'unbind,' 'unbind_mac,' and 'unbindall' so they can't be recorded into a demo (fixes having your keys changed when you watch a demo).
  • Updated Cp_Granary
    • Added a new entrance to the mid Red/Blue ramp rooms.
    • Clipping, lighting and perf improvements.
  • Tournament mode HUD fixes
    • Fixed seeing an empty alert tray under the stopwatch timer.
    • Fixed a bug where the time for the tournament mode stopwatch wasn't being displayed.
    • Fixed the countdown when both teams are ready always reading "0 seconds"
Counter-Strike: Source - Valve
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)
  • Improved engine handling of server queries
...