A small update for Half-Life: Opposing Force is now available:

Engine

• Fixed bug in skybox image loading
  
• Fixed bug in demo command processing
  
• Prevent certain path characters from being used in commands
  
• Enforce certain extensions be used for files specified in some commands

We have updated the public release of Half-Life: Opposing Force.

Changes in this update are:

• Fixed crash when entering certain malformed strings into the game console. Thanks to Marshal Webb from BackConnect, Inc for reporting this.
  
• Fixed crash when loading a specially crafted malformed BSP file. Thanks to Grant Hernandez (@Digital_Cold) for reporting this.
  
• Fixed malformed SAV files allowing arbitrary files to be written into the game folder. Thanks to Vsevolod Saj for reporting this.
  
• Fixed a crash when quickly changing weapons that are consumable. Thanks to Sam Vanheer for reporting this.
  
• Fixed crash when setting custom decals

We have updated the public release of Half-Life: Opposing Force. This update contains all the changes from the recent beta, thanks to the whole community for their help with testing and suggesting new features.

Changes in this update are:

• Converted Half-Life: Opposing Force to the new SteamPipe content system, for optimized delivery of the game
  
• Added support for Mac OS X and Linux operating systems
  
• Enabled Cloud support for save games
  
• Improved OpenGL rendering pipeline and output to leverage the capabilities in todays GPU
  
• Numerous bug fixes

We have released a Beta update for Half-Life: Opposing Force.
Changes in this update are:

• Added correct game sound track, mastered at 44kHz, 128kbit MP3 for better listening experience
  
• Fixed test microphone button not working

We have released a Beta update for Half-Life: Opposing Force.
Changes in this update are:

• Added support for voice chat in multi-player
  
• Fixed MSAA not applying if your video card did not support GL_EXT_framebuffer_multisample_blit_scaled

We have released a Beta update for Half-Life: Opposing Force.
Changes in this update are:

• Don't show the full loading dialog when changing level in a single player game
  
• Fix up a couple friendly names used for saves
  
• Don't cause a process exit if winsock returns WSAENETRESET
  
• For r_drawentities to 0 when running sv_cheats 0 in software mode, to match hardware behaviors
  
• Fixed corrupt model previews in Multiplayer options dialog

We have released a Beta update for Half-Life: Opposing Force.
Changes in this update are:

• Added support for friendly save names
  
• Fixed missing characters in training level and other areas
  
• Fixed incorrect loading dialog on level change

Half-Life: Opposing Force is now available as a Beta. This beta adds Linux and OS X support.

This beta involves significant changes for all platforms and your testing is appreciated, please report any bugs to our GitHub page, https://github.com/ValveSoftware/halflife/issues.

Linux and OS X users can simply install the Half-Life: Opposing Force application to access the beta. For Windows users right click the game in your Library, choose properties and then go to the Beta tab. Select the SteamPipe beta to start testing. Under windows to opt out of testing simply deselect the beta option on this same page. If you opt into the Beta under Windows please use the Local Files tab in Steam to validate your install once you have opted into the beta.