Introduction II [Black Mesa: Blue Shift OST]

Joel Nielsen - BMS - Blast Pit 2 (Mesa Remix)

Entropy : Zero 2 Soundtrack
All rights belong to Breadmen and Spencer Baggett
https://store.steampowered.com/app/1583720/Entropy__Zero_2/

did not make this it was made by Joel Nielsen on the black mesa team. All credit goes to them. 
-Black Mesa Xen SoundTrack 10 Harbinger

I did not make this it was made by Joel Nielsen on the black mesa team. All credit goes to them. 
-Black Mesa SoundTrack 13 Respite

I did not make this it was made by Joel Nielsen on the black mesa team. All credit goes to them.
-Black Mesa SoundTrack 21 Ascension Reprise