• Natascha, The Sandvich, The Killing Gloves of Boxing
  
• Added 35 new Heavy achievements
  

Added Arena game mode

• 5 arenas: Lumberyard, Ravine, Well, Granary, Badlands
  

Added 2 new maps

• Badwater Basin, a new payload map
  
• cp_steel, a community map by Jamie "Fishbus" Manson
  

Changes

• Added server map timeleft to upper right of scoreboard
  
• Added new firing sounds to The Backburner
  
• Removed the Custom Tab in the serverbrowser, and added the Tags field to the base Internet Tab
  
• Increased The Kritzkrieg's uber-charge rate bonus from 10% to 25%
  
• 32 player servers can now support an extra slot of SourceTV
  
• Made the freezecam item panel description easier to read
  
• Players now broadcast whether they chose a team directly or use autoteam
  
• Added proper handling of cart blocking recognition to Payload maps
  

Bug fixes

• Fixed bug where switching from flaregun-wielding Pyro to another class meant you didn't get a full ammo loadout on first spawn
  
• Fixed Spy watch arm not using team skins
  
• Fixed weapon switching preventing you from using secondary attacks for a 0.2s window after the primary became available
  
• Fixed players getting stuck in a bad animation state when class switching while spinning the minigun
  
• Fixed a loophole that allowed players to pickup weapons of other classes
  
• Fixed a bug that resulted in players earning more crit chance bonus in large, single damage events than they are supposed to
  
• Fixed an issue with the floating HUD +X health indicators that resulted in them appearing incorrectly
  
• Fixed a bug which caused the minigun spinning & firing sounds to occasionally stop while the Heavy was still firing
  
• Fixes the Loadout player model panel causing the in-game player facial animation to perform incorrectly
  
• Fixed spectators not having the target ID labels display correctly
  
• Fixed the cart alarm sound occasionally getting stuck on in Payload maps