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:
Mann vs. Machine

Operation Two Cities
Two new maps: mvm_mannhattan and mvm_rottenburg
New advanced tour featuring four missions
Two extra Boot Camp-only missions
Added 14 new achievements
Tour of Duty badge levels are no longer limited to 200
Players can earn a "Refund Upgrades" credit by collecting money during waves
The amount required is listed in the scoreboard, and varies per-mission
Any money collected – whether winning or losing – will count toward earning a credit
To redeem, visit an Upgrades station and click the "Refund Upgrades" button
Any money spent on buy-backs and Canteen charges will not be refunded
Detailed player performance stats added to the scoreboard
Damage and Tank. Total damage done to Gray Mann's forces.
Healing. Direct healing done to other players.
Support. A composite value that reflects anything a player has done to help their team:
Examples: reset a bomb, stun or slow an enemy, provide increased damage, block damage with invulnerability or shield, and lots more.
Money. The amount each player has collected.
Players can inspect upgrades on teammates via the "Inspect" key ("I" by default)
Fixed the Romevision tank not animating
Medic
Revive (no upgrade required)
Teammates leave behind a revive marker when they die
Target the marker with your medigun to revive them
Projectile Shield Upgrade
Build Energy by healing teammates, reviving and preventing damage via Invuln ÜberCharge.
Press ATTACK3 to activate when Energy meter is full (mouse3 by default)
While active:
Blocks all enemy projectiles
Damages enemies on touch
Mad Milk Syringes Upgrade
Syringe Gun needles apply Mad Milk (heal-on-hit for teammates) on contact
Healing Mastery Upgrade (previously two separate upgrades)
+25% heal rate per point
+25% revive rate per point
+25% self-regen rate per point
Overheal Expert Upgrade (previously two separate upgrades)
+25% more overheal per point
+50% duration per point
Canteen Specialist Upgrade
Shares canteen charge effects with heal target
+1 second charge duration per point
-10 canteen charge price per point
Soldier
Rocket Specialist Upgrade
+15% rocket speed per point
On direct hits
Stuns target (duration increases per point)
+15% increased blast radius per point
No range-based falloff damage
Heavy
Attack Projectiles Upgrade
Now has two levels
Level one is less effective than before
Level two is more effective than level one used to be
Price reduced from 600 to 400 per point
Rage Pushback upgrade activation moved to ATTACK3 (mouse3 by default)

General

[b] Added a new community map cp_snakewater_final1
Added new map stamp and strange filter to the Mann Co. Store
Added new achievements for Snakewater, Process, and Standin[/b]
Older event crates no longer expire on login, but have been updated to indicate they can no longer be opened
about:blank should now be a legal URL and won't get blocked for MOTD
Fixed bots using the Phlogistinator being able to airblast enemies
Fixed the stock Shotgun not appearing in the backpack with "Show stock items" option turned on
Fixed a problem causing map stamp leaderboards to not update under certain circumstances
[b] Weapons
Baby Face’s Blaster
Speed penalty changed to -10% (From -35%)
Boost is now only partially lost on air jumps instead of all jumps
Reduced Clip Size to 4
Removed 40% more accurate attribute
Removed Damage Penalty attribute
Speed at max boost is same as before (520)
Amputator
Added -20% damage penalty
Added +3 health per second when Weapon is Active bonus
Crusader’s Crossbow
Updated damage over distance: bolts now do a maximum of 75 damage (+variance) at max distance
Liberty Launcher
Added 25% reduced self damage from rocket jumps
Eyelander
Moved the eye glow position to Demoman’s eye patch. Changed the color to Cursed green.[/b]
VR Mode
Now supports resolutions other than 1280x800
Now supports cloning the main display (instead of using the Rift as an extended display)
Sharpness of the output has been significantly improved
Head-and-neck model has been fixed to remove unnecessary translation