what is this mdmp file type

what is this mdmp file type i been seening this on the bug reporting section and i downloaded and how do i open a mdmp file

mini dump

Care to elaborate?

A minidump is generated when HL2.exe crashes, it contains information about the state of the game when it crashed, as well as a memory dump to trace the cause. You can only make use of it if you have the source code of the executable that generated it.

thanks but how do i open one

You can open it in a text editor, but you won’t find anything of use, you need the source code to debug the problem.

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.