Via [url=https://store.steampowered.com/oldnews/234882]the Steam store[/url]:

[quote=Valve][b][u]Happy Smissmas 2024![/u][/b]
* 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: Overcast, Fortezza, Penguin Peak, Patagonia, Cutter, and Maul

* Added the Winter 2024 Cosmetic Case
* Contains 23 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: Fore-Head Slice
* Taunt: Peace!
* Taunt: Curtain Call

* Added 18 new community-created Unusual effects
* 9 new effects for Unusual hats
* 9 new effects for Unusual taunts
* All cosmetic and taunt cases will grant Smissmas 2024 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, 2025

[b][u]General[/u][/b]
* Fixed a client crash when previewing imported items in the Workshop dialog
* Fixed showing an error model when equipping the Scottish Resistance
* Fixed The Executioner not hiding the Scout's dog tags
* Updated the Mountebank's Masque to fix a problem with the materials
* Updated/Added some tournament medals
* Updated vsh_distillery, vsh_nucleus, vsh_outburst, vsh_skirmish, and vsh_tinyrock
* General
* Added the gamemode intro movie (made by Lacry, thanks)
* Improved the delivery of VSH-related voice lines for Soldier, Engineer and Sniper
* Updated some VSH-related voice lines for Saxton, Soldier, Engineer and Sniper (thanks The Rat Man)
* Added Hale's kill icons
* Visual improvements to Hale's Ability HUD (thanks Funicular)
* Added a visual cue signaling an upcoming Saxton Punch!
* Minor visual improvements to Saxton Hale and his particle effects
* Fixed the boss bar sometimes starting invisible
* Fixed a rare crash caused by seeing blood decals on Hale while playing on low graphics quality settings
* Fixed a rare bug when Hale's Ability HUD textures become missing
* Balance Changes - Saxton Hale
* Added Brave Jump Fatigue. Each consecutive jump will be less powerful, requiring a short break to restore to full strength
* Weightdown ability is disabled during Jump Fatigue
* Increased Hale's health by ~100HP per opponent
* Adjusted Hale's health formula against 24+ opponents - Hale now gains 2000HP for every opponent past 23 (thanks Megascatterbomb)
* Hale's resistance to knockback reduced from 75% to 35%
* Head Stomp damage now scales with Hale's downward speed, dealing between 64 and 193 damage (previously dealt flat 195 damage)
* Balance Changes - Mercenaries
* Explosives and fire now deal 50% more damage against Hale
* The 40% minigun damage penalty now applies to full crits only
* Broken Demoman shields now retain the charge ability
* Demoman shields now absorb only 50% of the incoming damage upon breaking (a would-be-lethal blow will leave the Demo at 1HP)
* Greatly decreased sticky trap damage reduction
* Removed Scottish Resistance's 20% damage penalty
* Baby Face's Blaster now loses 20% of its boost upon Wall Climbing

* Updated vsh_tinyrock (additional changes)
* Improved performance
* Fixed odd clipping at one of the spawns

* Updated vsh_distillery (additional changes)
* Improved performance

* Updated vsh_nucleus (additional changes)
* Fixed setup time ending five seconds too early
* Improved detailing in some areas
* Improved clipping on staircases
* Increased control point capture time to 15 seconds
* Removed collision on some lights
* Changed damage model and damage amount of the toxic waste pit and puddles

* Updated vsh_skirmish (additional changes)
* Fixed setup time ending five seconds too early
* Fixed an issue where Engineers could build in the crocodile pit
* Fixed not being able to wall climb certain trees in the main arena
* Fixed some lighting issues on stalactites and other props
* Parts of Hale's intro sequence no longer play while waiting for players
* Improved optimization and detailing in some areas
* Improved clipping on spiral stairs (Thanks Aar!)
* Updated security system

* Updated cp_brew
* The shortcut from RED spawn to the "A" point now has a nobuild trigger
* Added floor indicator for the health kit in the "A" point wooden shack
* Adjusted "A" point wooden shack to allow more breathing room
* Fixed getting stuck on the "A" gate's frame
* Fixed teletrap near "A" point ditch route
* Fixed being able to place buildings inside an out-of-bounds room outside "A" point
* Fixed some stuck spots near "B" point
* Fixed being able to shoot through a crack in the BLU forward spawn
* Fixed floating props in the diner
* Fixed one way door not forcing itself closed
* Cleaned up some collisions and clipping across the map
* Improved lighting on all of the archways

* Updated koth_krampus
* Fixed missing trees in skybox
* Improved look of waterfall texture near full health-kit
* Fixed minor visual errors
* Minor NPC clipping changes
* Fed krampus some oats

* Updated pl_emerge
* Switched on the cart light
* Fixed RED players being able to sit on the edge of an exit of BLU's starting spawn
* Fixed some doors showing incorrect textures
* Fixed the final capture point displaying an incorrect string
* Fixed the map occasionally playing incorrect ambient sounds
* Minor visual and performance tweaks

* Updated cp_carrier
* The Carrier now has full crits rather than mini-crits
* The Carrier now uses the robot voice lines
* Improved hearability of the Carrier's voice lines and footsteps
* Fixed visual bugs with the boss bar
* Fixed the Carrier sometimes becoming invisible while taunting
* Fixed animation glitches when a Demoman Carrier holds a Stickybomb Launcher
* Fixed occasional phasing through the elevator platform at BLU spawn
* Decreased size of the frog[/quote]

Rumor has it:

- Size is ~625 MB - data capped users should be prepared to take action