• Refactored how lightmaps are downloaded to the graphics card at level load. On some hardware configurations this can lower level load times significantly
  
• Optimized some particle systems to improve performance on some hardware configurations
  
• Player stats are now sent up as they change, rather than when the player dies
  
• Improved playback of sub-frame sounds
  
• Fixed a crash caused by alt-tabs during map load
  
• Eliminated unnecessary temporary memory allocation in scenefilecache

Team Fortress 2

• Badlands released
  
• Changes to Dustbowl
  
  • Added a new access point to the stage2 attacker gates (drop-down left from spawn), allowing attackers a way to reach the left route without being subjected to the spam and sentry gun fire
    
  • Fixed a gap in stage 3, cap 1 that allowed a player with to wiggle above the "ceiling" clip
    
  • Fixed a gap behind stage 1, cap 1 house
    
  • Fixed a high perch on stage1 cap1 house roof
    
  • Fixed a perch offering view of nodraw textures and the skybox (stage1 cap2 rock barrier)
    
  • Fixed a few places where rockets/demoman pipes could pass through non-solid models
    
  • Sealed up a gap over stage1 lower startgate
    
  • Clipped off tall windows in stage 3 to prevent sentry guns from behind built behind them
• Changes to Capture the Flag Well
  
  • Fixed trains not starting on map spawn
    
  • Removed cap association from red spawns that were spamming console
• Changes to Granary
  
  • Removed spawn timing advantage from the middle (from -3 to 0)
    
  • Fixed several model perch exploits (red, blue cp1 gate and blue cp2 gate pipe)
    
  • Fixed a few places where players could get stuck between containers and silos
    
  • Adjusted playerclips on red container that made it appear like players were floating
• Added a small delay (200 ms) before a zoomed sniper shot can get a critical hit
  
• Added server side convar mp_fadetoblack. Same functionality as Counter-Strike, used mainly during in-person tournaments and LAN events
  
• Added flamethrower "sizzle" sound when the Pyro is hitting a target
  
• Updated explosion debris to be a bit darker
  
• Fixed idle players not being kicked from the server if mp_allowspectators was set to 0
  
• Added ctf_well to the default mapcycle.txt file
  
• Added ctf_well to the default motd.txt file
  
• Fixed floor tile material type
  
• Fixed some weapon damage info missing from TF2 game stats
  
• Made some small changes to the Demoman viewmodel that were causing performance problems
  
• Added a new timer to the HUD to show the value of mp_timelimit. This is useful if you're playing a timed match on 2Fort, where you only set a timelimit on the server and no other win conditions.
  
• Added server log entry for buildings destroyed by their owner
  
• Fixed sentry gun shadows being clipped
  
• Updated glass material

SourceTV

• SourceTV now uses a hidden slot on the game server. This allows for 24 player servers to also have a SourceTV proxy connected to it
  
• Fixed Pyro's flamethrower flames not showing up in SourceTV