An update to Half-Life 2: Deathmatch has been released. The update will be applied automatically when you restart Half-Life 2: Deathmatch. The major changes include:

• Added 64-bit Support. 64-bit binaries will automatically be launched on systems with a 64-bit OS.
  
• 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
  
• Added UI scaling for high-resolution screens
  
• Added avatars to the scoreboard
  
• Added console convar "hl2mp_allow_pickup" to allow picking up objects without Gravity Gun
  
• Added kill, weapon equip, and health pickup events for Steam Game Recording
  
• Brought over the HUD/UI changes from HL2 Anniversary update
  
• Increased the hardcoded maxplayers to 100 to allow for more chaotic times
  
• Increased default maxplayers from 2 to 24
  
• Improved networking precision for local player positions, resulting in less prediction errors and better game-feel
  
• Made viewmodels use the proper Half-Life 2 viewmodel bob/sway behaviour
  
• 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)
  • Implemented prediction for SMG1, AR2, Crossbow and basic prediction for the Gravity Gun
    
  • Fixed prediction for Crowbar and Stunstick animations
    
  • Implemented prediction for sprinting and AUX power
    
  • Implemented prediction for crouching
    
  • Implemented prediction for duck-jumping
    
  • Implemented prediction for climbing and getting on/off ladders
    
  • Fixed player hull being mis-predicted in certain instances causing rollbacks every frame when e.g. crouching or against a wall
    
  • Fixed prediction errors when picking up ammo or taking damage
    
  • 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 a bug where the SourceTV player would get stuck in limbo if mp_allowspectators was set to 0
  
• Fixed ALT/AMMO text and related icons not showing on HUD
  
• Fixed weapon sounds and effects for Gravity Gun, SMG1, AR2 and Crossbow
  
• Fixed the AR2 playing the animation for alt fire twice
  
• Fixed the SMG1 and AR2 not playing their bob animations when moving
  
• Fixed the Crowbar always playing flesh hit sound effect
  
• Fixed the Grenade having the SLAM's impact sound effects
  
• Fixed the RPG laser dot not showing up
  
• Fixed a bug where if the alt fire was the last in the clip, it would play the dry-fire sound instead of the shooting sound
  
• Fixed death feed not showing player names
  
• Fixed a bug where player weapons could spawn below them at spawn and not be properly equipped
  
• 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