Via [url=https://list.valvesoftware.com/]HLDS[/url] and [url=https://store.steampowered.com/news/214110/]the Steam store[/url]:

[quote=Valve]- Fixed the Pyro's right hand c_model not drawing correctly
- Fixed The Razorback not being displayed in the 3D HUD player model and the loadout preview (community fix from gidi30)
- Fixed the Engineer's Destruction PDA using the wrong animation in the 3D HUD player model (community fix from gidi30)
- Fixed naming conflicts between the plr_hacksaw and plr_hacksaw_event localization strings
- Updated the Scruffed 'n Stitched cosmetic item to fix a paint problem with the second style
- Updated the display name for the Trench Warefarer cosmetic item to Trench Warfarer

- Updated the Strasbourg Scholar cosmetic item
- Fixed cross-cosmetic clipping
- Fixed triangulation mismatch on pants and resulting rig issue
- Fixed LOD bone collapse error
- Fixed minor UV stretching on LODs

- Updated pl_frontier_final
- Fixed Engineers being able to build in Red's final spawn room

- Updated plr_hacksaw
- Fixed non-zero roll on spectator cameras
- Fixed Erroneous clip brushes
- Simplified and merged door frames across the map to have fewer obstructions
- Removed some cover on each team's balconies that preventing being able to spam sentries
- De-cluttered finale roof so that you can travel from balcony-to-balcony
- Lowered rocks between middle and the finale
- Adjusted prop fades

- Updated ctf_turbine_winter
- Fixed issue with teleporters exploding when players used them in the vents
- Added extra ammopacks in the intel hallways
- Fixed cubemaps having odd reflections in the center area
- Adjusted clipping in the center area
- Added neutral Train Camera so you can enjoy the Slay Ride
- Added small details

- Updated pl_emerge
- Fixed some malformed geometry in Blu's first spawn
- Fixed unintentional perch point just outside Blu's first spawn

- Updated pl_camber
- Clipped sewer grate
- Disabled rock collision
- Increased Red respawn room
- Improved clipping
- Blocked off a sightline on the final point

- Updated cp_brew
- Fixed missing collision on red arrow outside Red's first spawn
- Fixed missing flatbed truck trailers outside of the diner

- Updated koth_snowtower
- The control point is now more closed-off
- Slightly extended the cover on the lower balconies on both sides
- Moved the ammo from the control point to the higher platform of the central tower
- Fixed z-fighting on the lower ramps on both sides
- Changed from toolsblockbullets2 to toolsplayerclip for the tree's clipping near the crossing
- Updated menu photos

- Updated koth_krampus
- Fixed minor visual issues
- Fixed Krampus' unique boss bar randomly getting replaced with the default one
- Fixed people getting stuck or telefragged when taking the Krampus portal
- Krampus' landing sound is now more audible
- Krampus now correctly destroys all buildings in his way

- Updated cp_carrier
- Adjusted fade distances of some areaportals
- Adjusted Blu team's respawn times
- Extended Blu team's respawn room
- Fixed hud text overlapping
- Fixed soundscapes not working correctly
- Fixed objective text not displaying properly
- Fixed the ability for the carrier to pick up restricted weapons
- Fixed players not becoming the carrier while standing on the platform as it resets
- Announcer's bomb voice lines no longer play after the bomb has been deployed
- Half-Zatoichi kills now restore 25% of the carrier's health instead of 50%
- Added 25% crit resistance to the carrier
- Added overtime while there is a carrier
- The carrier's health bar now displays their class icon
- Decreased size of the frog[/quote]

Rumor has it:

- Size is close to 200 MB

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[b]This is the last full month that Valve will be supporting Steam on Windows 7 and Windows 8.1 [url=https://help.steampowered.com/en/faqs/view/4784-4F2B-1321-800A]before support is abandoned on 1/1/24[/url], due in part to Chromium and its Embedded Framework also abandoning these platforms.[/b] Any future TF2 updates that moves the minimum Steam client version beyond the last one available for 7/8.1 will render it unplayable unless you upgrade Windows.