Not working on Windows 8 (permission issues)

Fix that worked for me:

Run Steam as Administrator (does not help that you have UAC turned off, you need to run Steam as Administrator anyways)
Then start BMS again

I am running Windows 8 professional (as part of the Microsofts DreamSpark service, I have access to Windows 8 before most others)

Black Mesa does no run properly on my computer, due to the fact that the mod does not have permission/access to change/write files in it’s own directory (permissions have been updated in Win8 compared to Win7).

In the console you can read many errors regarding not beeing able to create/change config files etc. It is also not possible to save any games or configs.

Also more importantly the game crashes after the first minute during the first Loading sequence!

Unfortunately, we are using an engine built prior to windows 8 and are unable to make any engine changes as we are a mod. You will have to contact valve or steam on these issues.

You can also try running the game with administrator privileges.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.