The Keeper [Black Mesa: Blue Shift OST]

Introduction II [Black Mesa: Blue Shift OST]

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 17 Interloper

I did not make this it was made by Joel Nielsen on the black mesa team. All credit goes to them. 
-Black Mesa SoundTrack 19 Event Horizon

I did not make this it was made by Joel Nielsen on the black mesa team. All credit goes to them. 
-Black Mesa SoundTrack 20 Resonance