Black Mesa Source

Black Mesa Archive Help!
#1

Where can I buy or download Black Mesa Source?

#2

Black Mesa is totally free.

More info on download:

https://wiki.blackmesasource.com/General_FAQ#Where_can_I_download_the_mod.3F

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.