Via the Steam Community:
Valve- Added missing files for Taunt: The Travel Agent
- Added No Hat styles for the Cozy Cover-Up
- Added VScript support for HIDEHUD_MATCH_STATUS flag to hide the Match Status panel
- Added a borderless window option to video settings
- Added bicubic lightmaps (from Half-Life 2: 20th Anniversary Update)
- Added radial fog (from Half-Life 2: 20th Anniversary Update)
- Added support for Steam Networking
- Made the default server name for listen servers include the player's name
- Made the game launch in native resolution by default instead of 640x480
- Client-side prediction fixes (these fix 'jank'/rollback in certain situations)
- Fixed a prediction bug where if the player was moved on the client, their input-based movement for that tick was not taken into account in non-player actions
- Improved prediction for walking on props and other entities
- Made certain client-side entities only trigger local prediction errors
- e.g. If the viewmodel experiences a prediction error, the player will not experience a prediction error
- Fixed prediction of viewmodel sway
- Fixed a prediction error regarding weapon idle animations
- Fixed certain breakable props not gibbing correctly
- Fixed an issue where certain variables like position would not be updated correctly to match the server in certain situations
- Fixed the player's base velocity (eg. conveyors, moving items etc.) getting subtly out of sync from client/server
- Fixed players being able to spam duel cancellation messages for a duel that doesn't exist
- Fixed not being able to join community servers via Steam invites or game info
- Fixed lighting position discrepancies for cosmetic items, weapons, and viewmodels (community fix from ficool2)
- Fixed Equipped label overlapping attribute icons in the loadout menu (community fix from Lindon)
- Fixed an issue with props and team colors when taunting with Australium weapons
- Fixed the Voices from Below effect not working when taunting with the Highland Hound set equipped
- Fixed player voice commands being abruptly ended when the player enters shallow water
- Fixed incorrect number on the Geneva Contravention achievement icon
- Fixed the Military Style for The Surgeon General to stay properly semi-visible at all angles
- Fixed some classes missing the BLU team material for That '70s Chapeau
- Fixed the Spanish-Latin America option being displayed as English in the Settings menu
- Fixed the MOTD dialog not working for Spanish-Latin America
- Updated attribute descriptions for The Scottish Resistance and the Stickybomb Jumper to use 'stickybomb' instead of 'pipebomb'
- Updated equip_region settings for The Little Bear, The Heavy-Weight Champ, The Grand Duchess Tutu, and the Combat Slacks to fix unnecessary conflicts
- Updated the Spooky Night and Ominous Night Unusual taunt effects to fix a visual bug (Thanks Kiffy!)
- Updated koth_overcast_final to improve optimization
- Updated ctf_applejack
- Added block bullets to some stores
- Unblocked a window at mid, allowing Snipers to shot across the middle hut
- Removed the missing texture in BLU spawn
- Gave a chicken a friend, because friendship is magic
- Updated cp_fortezza
- New radio model for spawn rooms
- Changed sentry shack ammo pack on last to a medium
- Adjusted health pickups throughout the map
- Changed kill volume on cap A double doors to be more consistent with visuals
- Improved bot support (Thanks Star Bright)
- Detail pass
- Updated pl_patagonia
- [Stage 1]
- Fixed some RED bots stuck forever trying to make an impossible jump on the stairs outside spawn
- Fixed the cart not capping the first point on extremely rare occasions
- [Stage 2]
- Improved optimization
- Fixed a nodraw floor near the first BLU spawn train bridge waterfall
- Fixed 3D skybox looking pitch black for players using mat_hdr_level 2
- [Stage 3]
- Improved optimization
- Fixed wrap assassin baubles colliding with a solid func_brush bounding box outside BLU spawn
- Removed the platform above the open choke of the last point
- Added an additional path to the window overlooking the open choke of the last point
- Fixed RED bots getting stuck on a solid fence outside the RED spawn
- Fixed 3D skybox looking pitch black for players using mat_hdr_level 2