Supreme Commander 2 - Valve
Updates to Supreme Commander 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

New Features
  • Build mode can now be accessed while holding shift.
  • Added Safe and SafeMode command line options as a better alternative to resetting monitor resolution - Using one of these options will start the game at 1024x768@60hz in fullscreen and allow the player to change his options to something else after the game loads.
  • Added build mode hotkey for Cybran Mass Convertor. Removed Ctrl-M key mapping for old Cybran mass convert ability, which no longer exists and was causing a crash.
  • By popular request, reset Season 2 ELO ratings.
  • Quitting a game will stop the replay from recording immediately

Fixes
  • Fix for targeting units under the influence of world forces (ie Magnetron).
  • Fix for units becoming unrepairable.
  • Partial fix for selected groups of units not all Teleporting or Jump Jetting when given the order.
  • Fix for Space Temple cooldown being activated even if the beacon was not placed.
  • Better handling for units getting stuck in a position when they try to reclaim something directly underneath them.
  • Fix for ACU/engineers going on a walkabout when trying to build something that overlaps with their current position.
  • Fix for some factories and engineers getting XP for killing things when they should not.
  • Fix for units colliding with terrain when boarding a carrier.
  • Fix for not adjusting a units health when it recieves a MaxHealth buff on non-DLC side.
  • You can no longer use the Magnet Pull, Magnet Push, or Pullinsmash ability while No Rush is active

AI
  • Fixed up AI platoon templates.
  • Fix for AI platoon sizes.
  • Fix for AI platoons "dancing around".
  • The AI influence map decay rate for mobile units has been lowered.
  • Fix for AI building too many Mass Fabricators.
  • Adjusted how much mass a Mass Convertor adds to the AI's Resource Manager.
  • AI will only build 1 ProtoBrain.
  • AI will attack ACUs more in Assassination mode.

Known Issues/Under Investigation
  • Pre-1.21 Replays will not function with 1.21.
  • Teleporting/Jumpjetting group fix only partially implemented.
  • Memory Management and allocation optimizations.
  • Desynch related to VTOL aircraft.
Worms Reloaded - Valve
Updates to Worms Reloaded have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Worms Reloaded
  • An adjustment has been made to the Jump key timing to make double jumping easier
  • Additional fixes have been implemented for frontend navigation with game pads.
  • The Game Style name in the “Show Player Games” screen is now localized
  • A fix has been added to ensure that Sentry Guns are always the correct team colour when placed in Online Multiplayer games
  • A fix has been implemented to ensure that the ordering of players in the lobby is now consistent between all players. This should fix issues whereby player avatars did not match up with the correct names and also alleviate some of the issues experienced with the “Ready?” light.
  • The ability to create a lobby has added to the Multiplayer Options menu. This will allow players to host their own lobbies without the need to search for available lobbies beforehand
Product Update - Valve
Updates to Rhythm Zone have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:
  • Challenge Mode added, along with 13 new achievements. Users can now send and receive high score challenges, and view an all new challenge leaderboard.
  • New In App Messaging system implemented on main menu, alerting players when Challenges arrive, or for important Rhythm Zone announcements.
  • Updated Scoring system that allows for a more accurate representation of player performance.
  • Fixed bug where during gameplay songs would continue playing when the game was paused while Advanced Audio was turned OFF
To celebrate the launch of multiplayer support Rhythm Zone is 33% off until September 20th.

Plants vs. Zombies GOTY Edition - Valve
Updates to Plants vs Zombies: Game of the Year Edition have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Plants vs Zombies: Game of the Year Edition
  • Includes various fixes for Steam/Cloud support
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:

Engine (CS:S, DoD:S, TF2)
  • Fixed clients locking up while attempting to load the game and re-enabled signature checking

Team Fortress 2
  • Fixed a case where some items would display an empty string for their name
Worms Reloaded - Valve
Updates to Worms Reloaded have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Worms Reloaded
  • Enabled Steam crash mini dumps to get additional feedback on the crash issues some people are experiencing
  • Lobby search distance filter added so users can select from regional, far and worldwide. This is set to worldwide by default
  • Added a time out on lobbies so that redundant lobbies won't be found in a search
Left 4 Dead 2 - Valve
Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
  • Dev Choice Mutation: Follow The Liter
The Guild II Renaissance - Valve
Updates to The Guild II: Renaissance have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

4.15
  • Description of Monasteries on Novaesium broken
  • AI didn't use new professions (has been tweaked a bit)
  • Possibility of war tweaked
  • War fixed (Inventory-bug, War-only-once-bug)
  • Dynasties shouldn't die so early now
  • Amount of workshops displayed at the new-title-pergament counted also fields and meadows
  • Wrong icon for the kontor fixed
  • Forced marriage now only works for non-dynasty-members (you were able marry the whole dynasty of your enemies in MP)
  • Capturing mines now is no longer a good way to make money
  • You could save debts in your strongbox
  • Graveyard AI shouldn't curse buildings that much now
  • Information window of beggars deactivated
  • Children were not controllable after adding to party
  • Bribe should now work properly
  • Warehous upgrades fixed
  • Miller produces more and faster now
  • Privilegue "lower office level" (or so) now disappears when the char gets a higher title
  • Trials now work properly incl. penalties
  • AI also charges other characters now
  • Scaffolds of warehouse corrected
  • Completely overhauled the market
  • Crash when music changes fixed
  • New multiplayer lobby form
  • Banker now works longer
  • Dyes were not produceable
  • Text errors
  • Map errors
  • Fishes now have animated nifs again
  • In Cologne there were two similar chappels
  • New sellicon
  • Soundlocator on Novaesium map corrected
  • Added missing resources on some maps
  • Workingtime for banker increased to 12 hours
  • kontor hat a bad rendering icon
  • Graveyard has been smoking out of the roof
  • City lamps fixed
  • Battle behaviour fixed: Allies don't flee anymore
  • It could occur that a thug was not attackable after he started to attack a building
  • Attacking a building now should work properly
  • Boobytrap now need resources
  • Tirades are now sellable
  • It was possible that the market was flooded with raw materials. This should not happen anymore
  • Worker don't disappear anymore or get stuck in woods or rivers
  • There should be no spinning carts anymore
  • The donkey lost his ability to teleport
  • AI-production of raw materials reworked (also has an influence on production of high tier products)
  • AI now builds meadows and fields
  • Stock purchase warrants nerfed
  • Stock order fixed
  • now you get what you've ordered
  • Binge fixed
  • Diplomats now leave your estate also if you canceled the measure
  • AI now should buy titles more often
  • Prices for titles lowered a bit
  • Juggler now gets for work
  • Possible fix for the blackscreen issue activated
  • Smuggling-measure reworked
  • AI now shouldn't get any offices anymore without the appropriate title
  • Stone rotaries work properly now
  • Several causes for OoS messages fixed
  • Mouse icon for the Travell-measure added
  • Measure "Upgrade residence" can't be clicked during upgrade anymore
  • You can see what profession your candidate is before you start the courtship (the profession is shown in the character screen)
  • Medicus treatment reworked
  • Higher titles now need a specific fame level
  • War on the Hansa map was buggy
  • Added mills and orchards on some old maps
  • Cost for thugs and bodyguards increased so their equipment can't be sold anymore with profit
  • If you died in war your husband/wife was not able to choose another partner
  • Guild elders don't disappear after some time now
  • Orphans don't get older now and they also need some sleep
  • The measures for buying an engagement ring or adopting an orphan sometimes stopped
  • Fixed a bug which prevented the player from choosing another town than "Hall" when playing on the map of Kufstein
  • Allied characters don't flee anymore if they see you doing something illegal, they'll help you now
  • Many small bugs...
Product Update - Valve
Updates to Counter-Strike: Source Beta have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source Beta
  • Fixed a bug where the player crouching/standing animations were delayed until after (from the player's local viewpoint).
  • Changed the way that scope zooming works so that it is no longer affected by client-server latency, and zooming begins immediately for the local player. This fixes an issue that would give an advantage to lower ping players and penalize higher ping players.
  • Fixed animation problem caused by aborting bomb plant by switching weapons (“crab walk”).
  • Crosshairs now have customizable size, thickness, and color:
    • cl_crosshairsize specifies the size of the crosshair in pixels at 640x480 resolution
    • cl_crosshairthickness specifies the thickness of the crosshair in pixels at 640x480 resolution
    • The crosshair now scales proportionately for all screen resolutions. This replaces the old scaling behavior, and the cvar cl_crosshairscale is no longer used. Players can revert to old crosshair behavior by setting cl_legacy_crosshair_scale to 1.
    • Setting cl_crosshaircolor to 5 enables the use of custom crosshair colors, specified by cvars cl_crosshaircolor_r, cl_crosshaircolor_g, and cl_crosshaircolor_b.
    • The default of cl_crosshairuseapha has been changed to 1. Alpha blending makes the crosshair much more visible on new HDR maps, and it is recommended that existing players enable this setting manually or through the options interface (Multiplayer->Crosshair appearance->Translucent).
    • Cvar cl_legacy_crosshair has been renamed to cl_legacy_crosshair_recoil for consistency.
  • Fixed inverted translucency preview on crosshair configuration panel.
  • Removed the ability for players to temporarily stand on and jump from thrown grenades and jumping players. Legacy behavior can be enabled by setting sv_enableboost to 1.
  • Fixed issue with players “stacking” on ladders. Players are no longer prevented from moving off a ladder when they are in contact with a player beneath them.
  • Fixed UI issue causing Steam dialog boxes to be unreadable over certain backgrounds.
  • Fixed a bug which allowed players to move the bomb with +use when sv_turbophysics was enabled.
  • Fixed a bug that caused crosshair to expand when attempting to fire an empty gun or when holding trigger on pistols.
  • Players are no longer kicked for team killing during mp_spawnprotectiontime if mp_autokick is not enabled.
  • Fixed a bug which caused incorrect FoV on zoomed sniper rifles after reload.
  • Fixed FoV on wide-screen display modes.
  • Fixed a bug which caused incorrect zoom for a spectator watching a player with a sniper rifle.
  • Fixed a crash that could occur if a player disconnected shortly after attacking a bot.
  • Bomb icon now has priority over dominated/dominating icon on scoreboard.
  • Deathcam now allows a short period of camera movement (matching pre-OB behavior) when a player dies.
  • Bots now use distinct Terrorist and Counter-Terrorist icons on the scoreboard, voice indicators, end of match, and freeze panel.
  • The round clock on the spectator UI is now replaced with a bomb icon after the C4 has been planted.
  • Fixed a bug which caused models to occasionally appear non-animating when cl_minmodels and low violence mode were both enabled.
  • Fixed the Buy Menu not taking into account the discounted price for Kevlar + Helmet if you already have Kevlar (not damaged) or a Helmet.
  • Fixed cases where flashbang was not visible but still blinded the player.
  • Reduced blindness amount when looking away from a flashbang.
  • Made smoke grenades block flashbangs.
  • Changed the way ammo purchasing works. Details are here: http://forums.steampowered.com/forums/showthread.php?t=1428239
  • Made another pass on fixing bugs and exploits in de_inferno. Details are here: http://forums.steampowered.com/forums/showthread.php?t=1406537
  • Added a checkbox to the Options->Audio dialog to control muting the audio when the game window is in the background.
  • Fixed crash in custom maps using the trigger_camera entity.
  • Fixed a crash that could occur if a player disconnected shortly after attacking a bot
Tropico 3 - Valve
Updates to Tropico 3 & Absolute Power have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Tropico 3:
  • Fixed stuck pause mode related to road construction shortcut
  • Roads can no longer be placed when disabled in a mission or challenge event
  • Made resolution and refresh rate detection more reliable
  • Fixed pollution of logging camp for first work mode
  • Almanac backlog increased to 100 years
  • Resolved issues with uploading islands
  • Fixed an issue with the flatulence flaw
  • Fixed several challenge events not working properly
  • Fixed several localized text errors
Absolute Power:
  • Fixed stuck pause mode related to road construction shortcut
  • Roads can no longer be placed when disabled in a mission or challenge event
  • Made resolution and refresh rate detection more reliable
  • Resolved UI displaying during outro cutscenes
  • Building icons no longer appear over privatized buildings
  • Fixed nationalist minor demand for immigration
  • Fixed outlawing faction edict with save/load game
  • Fixed an issue with the flatulence flaw
  • Fixed several challenge events not working properly
  • Fixed several localized text errors
...