This addon, will allow you to play Half-Life 2 Deathmatch By yourself, With Bots. I Am a Singleplayer Fan. Adding this game To my SP Collection Was awesome...
This is Regular Half-Life 2 Deathmatch ported over to the Orangebox Engine,It also comes with some bug fixes.
Half-Life 2 Deathmatch: Orange Box Beta 4
Fixed Player animation issues
Fixed Physics objects rotating automatically when dropping them with the Physcannon
Fixed Stunstick spark issues
Fixed Shotgun reload issue
Fixed Shotgun fast weapon switch bug where it would get stuck on the reload animation
Fixed Combine movement sounds (Updated)
Added Alyx and Barney player models
Added the option to use First Person Ragdolls to Advanced Multiplayer Options
Added Report Bug to the Game Menu (Reported Bugs will go to valve)
Changed the scoreboard back to normal HL2DM Style
Fixed physics objects in dm_lockdown being invisible