Starting today the Counter-Strike: Source Beta will be available to all PC Counter-Strike: Source players. As we continue to update CSS and address issues, we want to make sure to not destabilize the core game. By releasing updates to CSS Beta first, we will be able to solicit community feedback before those changes are applied to CSS.

If you would like to be part of the group that helps us test future updates of Counter-Strike Source, please join the Beta - simply install and launch "Counter-Strike: Source Beta" from your games list in Steam. To give feedback on the changes, report bugs, or offer suggestions, please use the CSS Beta forum. Don’t worry, you can join the Beta program and still play the standard Counter-Strike: Source at anytime. The Counter-Strike: Source Beta is currently not available on Mac.

Here are the change notes for today's CSS Beta release:

Fixed prediction errors that were causing greater weapon inaccuracy (bullet spread) on client than server.

Made the bomb the primary target of a USE command. This fixes a problem with objects placed around the bombsite interrupting defuse attempts.

Fixed the ‘skating’ behavior that could occur when a bomb planting attempt was aborted. Also fixes the resulting out of sync hit boxes.

Fixed bug in which a player who crouches rapidly and repeatedly was seen as stationery by other players.

Fixed problem in which the sound of a reload that was occurring when a player was killed persisted into spectator mode, making it sound like a reload was taking place near the spectated player.

Gave chat interface priority over scoreboard to reduce conflict between the two.

Increased size of HUD icons.

Fixed bug with env_hudhint that caused problems when its value was greater than 255 characters.

Added fcvar_archive flag to mat_hdr_level, r_rootlod, r_waterforceexpensive.

Made the message of the day screen dismissible by hitting ENTER.

Improved the look of the font on the achievement toast.

Fix servers not being to set sv_hudhint_sound

Added console variable cl_hudhint_sound

Added cvar sv_enablebunnyhopping, defaulted to 0. ( A value of 1 autotags the server with "bunnyhop" )

Additionally, we've made some Counter-Strike Beta only changes to simplify perf testing. These changes only exist in Counter-Strike Beta and will not affect Counter-Strike:

Disabled HDR

Disabled vsync

Disabled motion blur

Disabled stats

Updates to Rhythm Zone have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

• Unicode Support
  
• New "Play My Music" results screen implemented that features current Friend and Global leaderboard status, and presents current or former high scores
  
• High Score and Global High Score are now presented on the Song Info screen
  
• New in-game HUD elements compare current scores to previously obtained high scores, and updates when a previous high score is surpassed
  

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

• Fixed server freezing
  
• Fixed Cloudscript failing in non english
  
• [TTT] Changed ragdoll (corpse) carrying to be easier
  
• [TTT] Changed fall damage to be lower if you land on another player, and made it damage them as well
  
• [TTT] Changed mute team key for spectators to F2 (was Alt)
  
• [TTT] Added version number to game description in server browser, with an asterisk if custom weapons are present
  
• [TTT] Added quick switch to slot 7 and back under the Noclip key, or with "ttt_equipswitch"
  
• [TTT] Added "ttt_quickslot (number)" command for switching to a slot without the menu
  
• [TTT] Fixed corpse data networking to be more reliable
  
• [TTT] Fixed Silenced Pistol not letting you take pistol ammo
  
• [TTT] Fixed replaced player spawn ents not taking effect until the second round
  
• [TTT] Fixed error in weapon spawning fallback for weaponless maps
  
• [TTT] Fixed issue where carried objects would jitter
  
• [TTT] Fixed Traitor crosshairs not being red
  
• [TTT] Fixed DNA Scanner and Binoculars world model being visible when held
  
• [TTT] Fixed error spam when a voice indicator was created for a nonexistent player
  
• [TTT] Fixed damage by thrown props not getting attributed to the throwing player
  

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

• New Mutation: Gib Fest!
  
• Localization updates and fixes
  

Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source

• Fixed a possible memory corruption on player disconnect, likely the cause of windows dedicated server crashes
  
• Adjusted scoreboard layout for 5:4 screen resolutions (1280 x 1024)
  

Updates to Alien Swarm have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Alien Swarm

• Fixed Assault Jets using up more than one charge when you have high ping
  
• Fixed HLMV material loading when running a mod
  
• Fixed a Steam cloud bug in the SDK source code