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

• Balance: Shield Support beam being drastically re-balanced with lower beam rate and capacitor, and only able to have one beam at a time on each shield. Also now auto-selects the lowest friendly shield available.
  
• Balance: Frigate disruptor bombs damage increased from 60 to 75
  

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

• The Vindicator’s grenade explosion effect should no longer crash users running a GTX260 graphics card.
  
• Fixed a bug where marines would continue to be buffed by the Damage Amp if they were standing in it when it expired.
  
• Fixed ammo usage on the Tesla Cannon to properly decrease 4 times a second instead of 2 (doubled clip size to account for this).
  
• Rebalanced Tesla Cannon’s damage to encourage it to be used more as a support weapon.
  
• Tesla Cannon will now use ammo slowly even when it isn’t damaging something.
  
• Fixed Unicode text chat
  

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

• Second half of 7/23 update
  

The biggest change in this new update is the reworking of the game's beat detection system. After a lot of feedback, we overhauled the system in hopes of improving the experience for our players. We have also made it so that everyone's song count in the demo version will reset. We want everyone to be able to try out the new beat detection, and hope that if there are any people out there who were put off by the previous system, they will give the game another chance and possibly change their minds about buying the full version.

In addition to this, we have also fixed several bugs and added a couple of new features. Here is a list:

• Added top 10 most played artists and songs to the Scores menu.
  
  
• Roulette, Auto Combo and Zapper powers are unlocked faster. (25, 50, 75 activations down to
  20, 40, 60 activations to unlock)
  
  
• Fixed leader board scores not updating correctly sometimes when you got a higher score.
  
  
• Fixed bug in file browser that didn't allow CDs to be played.
  
  
• Fixed bug in file browser that made folders not show up under certain drive letters.
  
  
• Fixed Last.fm account name input to accept underscores."
  
  

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: Healthpackalypse!
  

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

• Added Steam Clan Tag support ( Set yours in Options->Multiplayer->Advanced )
  
• Added new achievement "CLAN WARFARE": Win a match of at least 10 players where the entirety of each team is composed of a single clan.
  
• All weapon fire rates now tuned to match their pre-update, tickrate 100 equivalents. (http://forums.steampowered.com/forums/showthread.php?t=1368659)
  
• Added automatic server tagging for some server convars ( "mp_startmoney", "mp_friendlyfire", "bot_quota", "sv_nostats", "sv_allowminmodels" )
  
• Fixed some issues for players who were experiencing stat corruption.
  
• Fixed several server crash exploits.
  
• Fixed server commands "sv_disablefreezecam" and "sv_nowinpanel" not working on dedicated servers.
  
• Adjusted some DX9 shaders to look more like their DX8 counterparts, e.g. flashbang effect.
  
• Community Requests:
  
  • Fixed entity I/O messages "OnPlayerPickup" and "OnPlayerUse".
    
  • Restored UTF-8 support in the console.
    
  • Added env_hudhint entity, for use in custom maps (The allplayers flag must be set for the hint to work in Counter-Strike.)
    
  • Added client convar "sv_hudhint_sound" to turn off emit sound for hud hints.
    
  • Restored the "cl_minmodels" client convar.
    
  • Added server convar "sv_allowminmodels" that allows them to prevent clients from using "cl_minmodels".
    
  • Added a button to Options->Multiplayer that allows players to reset their in-game stats.
    
    • Note: Due to the nature of stats corruption, it is not possible to automatically fix all types of stats (such as weapon statistics reflecting usage of the wrong weapon). Players who suspect their stats are incorrect and wish to start fresh may want to use the new stat reset feature
      

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

• Matchmaking distinguishes between games in progress and games in the briefing
  
• Updated Hammer’s simple compile options
  
• Fixed fast reload sounds and incidental marine conversations