Installation Instructions mod HLFX: Lost in Black Mesa
First install Xash3D.
Install the mod in the Xash3D folder.
Launch the mod through lbm_fxsystem/lbm_fx.exe to configure graphics quality in the game.
Play!
Installing Lost In Black Mesa - Simple Version (does not require Xash3D engine)
Extract the LostInBlackMesa folder and place it into the root directory of the game.
Launch the game, go to the Change game menu, and select the mod.
Play!