An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:

Happy Smissmas 2021!

• All players who play TF2 during the event will receive a Stuffed Stocking as a gift! Stockings contain goodies for good little Mercenaries.
  
• Featuring 6 new community maps: Altitude, Bread Space, Cascade, Chilly, Doublefrost, and Polar
  
• Added the Winter 2021 Cosmetic Case
  
  
  • Contains 20 new community-contributed items
    
  • The Festivizer can be found as a bonus drop when opening the case
  
  
• Added 3 new community-contributed taunts to the Mann Co. Store
  
  
  • Taunt: Doctor's Defibrillators
    
  • Taunt: Shooter's Stakeout
    
  • Taunt: The Hot Wheeler
  
  
• Added 27 new community-created Unusual effects
  
  
  • 16 new effects for Unusual hats
    
  • 11 new effects for Unusual taunts
  
  
• All cosmetic and taunt cases will grant Smissmas 2021 Unusual effects instead of their normal Unusual effects during the event. This does not include crates.
  
• Mann Co. Store winter sale!
  
• Smissmas runs through January 7th, 2022
  

• Fixed Engineer losing metal when hitting damaged buildings while they are being re-deployed after pick-up
  
• Fixed Wrap Assassin projectiles colliding with other projectiles and func_lod entities
  
• Fixed Halloween: Voices From Below spell not working correctly with more taunts and the Ready voice lines
  
• Updated soundlevels for some competitive mode sounds
  
• Updated the description for the Blutsauger to clarify its attributes
  
• Updated sound channels for some voice lines
  
• Updated hurtme command to allow negative health values when using sv_cheats
  
• Updated koth_probed to fix an error model
  
• Updated/Added some tournament medals
  
• Updated the localization files