An update to Counter-Strike: Source has been released. The update will be applied automatically when you restart Counter-Strike: Source. The major changes include:

• Added 64-bit Support. 64-bit binaries will automatically be launched on systems with a 64-bit OS.
  
• Added a borderless window option to video settings
  
• Added bicubic lightmaps (from Half-Life 2: 20th Anniversary Update)
  
• Added radial fog (from Half-Life 2: 20th Anniversary Update)
  
• Added support for Steam Networking
  
• Added UI scaling for high-resolution screens
  
• Made the default server name for listen servers include the player's name
  
• Made the game launch in native resolution by default instead of 640x480
  
• Client-side prediction fixes (these fix 'jank'/rollback in certain situations)
  • Fixed a bug where when unducking, the view could glitch out if the player doesn't have space to unduck
    
  • Fixed gifts not randomly dropping when players are killed during the winter event
    
  • Added sv_autobunnyhopping so bhop servers can have this wanted behaviour with client-side prediction
    
  • Fixed a prediction bug where if the player was moved on the client, their input-based movement for that tick was not taken into account in non-player actions
    
  • Improved prediction for walking on props and other entities
    
  • Made certain client-side entities only trigger local prediction errors
    • e.g. If the viewmodel experiences a prediction error, the player will not experience a prediction error
  • Fixed prediction of viewmodel sway
    
  • Fixed a prediction error regarding weapon idle animations
• Fixed certain breakable props not gibbing correctly
  
• Fixed an issue where certain variables like position would not be updated correctly to match the server in certain situations
  
• Fixed the player's base velocity (eg. conveyors, moving items etc.) getting subtly out of sync from client/server

An update has been released for Half-Life 2 and the Episodes.

- Fixed a Linux client crash on launch.
- Localization updates.

An update has been released for Portal 2.

- Fixed a compatibility issue that was causing a crash on Linux clients.

An update has been released for Left 4 Dead 2.

- Fixed a compatibility issue that was causing a crash on Linux clients.

An update has been released for Portal 2.

- Fixed exploits used to crash remote players.

An update has been released for Left 4 Dead 2.

- Fixed exploits used to crash remote servers.

An update has been released for Left 4 Dead 2.

- Fixed some exploits used to crash remote servers.

• Enable support to keep music playing during level transitions throughout the base Half-Life 2 campaign (no convar needed).
  
• Added support for displaying an active Workshop campaign name in your Steam friends list.
  
• Added a slider to the settings menu to allow scaling stick sensitivity for gamepads.
  
• Fixed issue with overlapping commentary tracks if a commentary track was playing between level loads.
  
• Fixed issue where gamepad buttons may be permanently stuck pressed after saving the game.
  
• UI fonts updated for better support in Cyrillic languages.
  
• Fixed Thai font rendering on Linux.
  
• Added initial support for Ukranian and Vietnamese.
  
• Various crash fixes when switching between episodes.
  
• Fixed soundscape playback for the Citadel menu background map.
  
• Removed collision from an underwater tube that speed runners enjoy.
  
• Updated localization files.

• Fixed issue where NPC reactions to the player's flashlight and some incidental dialogue would not play after switching between episodes.
  
• Fixed amount of bloom applied after switching between Episode One and Episode Two.
  
• Fixed the FOV setting not applying until you got the HEV Suit if you started a new game and watched the intro sequence.
  
• Fixed issue where HUD messages for pickups and responses to some console commands would display multiple times after switching between episodes.
  
• Fixed scaling for Aim Assist at very high or very low framerates.
  
• Fixed issue where the gamepad weapon selector UI could be stuck on after relaunching the game with no gamepad connected.
  
• Fixed non-workshop mods displaying their title as "Half-Life 2" on the main menu.
  
• Improved load times when switching between episodes or when adding and removing workshop content.
  
• Workshop - Fixed some mods that were tagged to load as Episode One data but were being loaded as Episode Two mods.
  
• Workshop - Better handling for addons that are corrupt.
  
• Workshop - Fixed support for weapon mods that reskin the Stunstick.

NOTE: There is now a public "beta" branch for Half-Life 2 that will periodically receive updates before they go live to all players.

• Fixed a crash that could occur in some languages when starting a new chapter.
  
• UI - Fixed some weapon icon alignment issues at various resolutions.
  
• Workshop - Fixed campaigns set to expand on Episode One loading some Episode Two content.
  
• Workshop - Always show the My Uploads page, even if not in developer mode.
  
• Workshop - Various UI adjustments and improvements.