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:

Scream Fortress 2013 has arrived

• Help settle the score in one of the longest running feuds in Mann history
  
• Comic and additional information available on the website (http://www.teamfortress.com/bazbobarrabus)
  
• Scream Fortress 2013 runs until Nov 11, 2013
  
  
• Added New Halloween Map Helltower
  • Equip a spell book and cast spells against your enemies
    
  • Spells can be found by pushing the cart, killing enemies and during the Witching hour
    
  • The Clocktower contains powerful magic during the Witching hour
    
  • Win the race to start mega healed in the final battle for your prize
  
  
• Granting Spellbook Magazine to all players who launch TF2 during Scream Fortress
  
  
• Added over 100 Halloween tagged items from the TF2 Steam workshop
  
• Added Spooky Crate and Spooky Key to drop list and Mann co Store respectively
  
• Added class Transmogrifier's to covert Scream Fortress 2013 items of one type to another
  
• Added item Enchantment: Eternaween
  
  
• Enabled Halloween event maps in quick play
  
• Enabled Halloween gifts on Halloween event maps
  
• Enabled Halloween Spell Potions
  
• Enabled Mann Vs Machine event map Wave 666 in bootcamp
  
• Enabled Halloween themed Unusual Effects to be found from Mann Co Supply Crates
  
• Haunted Quality Items can now be listed on the Steam Market place

Map : Ghost Fort

• Lowered Merasmus's base health

Weapon Changes

• Medic's Crusader Crossbow now silently reloads when unholstered, similar to Pyro flaregun
  
• Fixed the charge rate for the Bazaar Bargain when the player has 0 heads
  
• In PvP Medics can now see the clip status of a patients active weapon

Item Fixes

• Updated The Air Raider so it can be painted correctly
  
• Updated The Bone Dome so it doesn't hide Pyro backpack
  
• Strange Part: Kills While Ubercharged can no longer be applied to Strange Equalizers and Escape Plans
  
• Fixed the backpack panel using the wrong "drop_sound" when items are moved around

Virtual Reality changes

• Improved readability of the UI in VR
  
• Removed the IPD calibration tool. TF2 will now obey the Oculus configuration file. Use the Oculus calibration tool in your SDK or install and run "OpenVR" under Tools in Steam to calibrate your IPD.
  
• Added dropdown to enable VR mode in the Video options. Removed the -vr command line option.
  
• Added the ability to switch in and out of VR mode without quitting the game
  
• By default VR mode will run full screen. To switch back to a borderless window set the vr_force_windowed convar.
  
• Added support for VR mode on Linux

Misc Bug Fixes

• Fixed an exploit that allowed unlimited uses of noisemaker items
  
• Fixed not being able to earn the Brotherhood of Steel achievement in MvM (play with 5 friends)
  
• Fixed the camera target not always being visible when using the replay editor
  
• Removed some servers that forged player counts from quickplay and the server browser