The Summer Smash has arrived! Celebrate the first day of summer with  NEW, free to play TF2, a lite version of the classic hat based  multiplayer game! To celebrate the release of TF2F2P, we're launching a  new, exciting content update and the world premiere of the much  anticipated Meet the Medic! And we're making it easier than ever to join  the fray, with the new matchmaking system, launching with this update!  If that wasn't enough, the new Raid mode allows for players to fight  against the boss as they try to capture control points! 
The patch notes are as follows
The major changes include:
    * Added 6 new weapon sets!
    * Added over 25 additional new weapons!
    * Added over 30 new hats!
    * Added 5 new community contributed paint colors!
    * Most hats are now paintable
    * Added 4 new unusual effects
    * Added a new matchmaking system that allows players to easily and quickly join matches
    * Added main menu option to view Meet the Team videos and comics
    * Added new startup music, "Ze Hurting is More Rewarding"
    * Hooked up new community contributed voice responses to Engineer
    * Added community contributed weapon sounds to most weapons
    * Added new kill icons. Every instance of death should have a kill icon.
    * Added new Payload map, Barnblitz
    * Added new Payload map, Cashworks
    * Added new mode: Raid and 2 new Raid maps. This mode is a boss based mode similar to the Halloween event. 
    * Added Capture the Flag to the list of modes supported by Badlands
    * Added 15 new achievements
    Map Changes
    Itemtest
    * Improved loading time for map by reducing resources needed.
    * Fixed several minor glitches with items not behaving as intended
    * Fixed rare crash caused by material overflow
    * Added tooltips to the Itemtest menu
    
    Weapon Changes
    Loch-N-Load
    * Now reloads two granades
    * Added new reloading animations
    * Fixed grenades not shattering when hitting certain world entities
    * Added a new, unique grenade model. 
    * Fixed damage spread not being applied correctly
    Shortstop
    * +10% reload time
    * Slightly tweaked the damage falloff at medium range. 
    
    Eyelander
    * Removed random crit penalty
    * Lowered speed bonus given for each head
  
    Half-Zatoichi
    * Increased range to match other swords
    * Now only heals 50% of health from each head taken
  
    Frying-Pan
    * Can now be equipped on Heavy and Pyro
    Crusader's Crossbow
    * Will now reload more like the Flaregun
    * Added unique projectile
    * Now uses Needlegun taunt
    * Improved model based on creator's suggestions
    * Slight reloading animation tweak
    Fan-Of-War
    * Mark of death now lasts 30 seconds
    * Added new sound effects for hitting and mark of death
    Kritzkreig
    * Improved quality of textures and model
    Rocket Jumper
    * Removed damage penalty
    * Made craftable, and added to random drops. Previously purchased RJers are now vintage and tradable. 
    * Added unique model
    Sticky Jumper
    * Added unique model
    * Replaced damage vulnerabilities with +100% explosive damage taken. 
    * Made craftable and added it to the drop system. Previously purchased SJers are now vintage and tradable.                      
Quelle: 
http://forums.steampowered.com/forum...60%C3%82%C2%A8