"apache/ap_rotor1.wav" "portal_house/alienflying.wav"
"apache/ap_rotor2.wav" "portal_house/alienflying.wav"
"apache/ap_rotor3.wav" "portal_house/alienflying.wav"
"apache/ap_rotor4.wav" "portal_house/alienflying.wav"
"apache/ap_whine1.wav" "portal_house/alienflying.wav"
"apache/osprey_takeoff.wav" "portal_house/alienflying.wav"
"turret/tu_fire1.wav" "ambience/alienlaser1.wav"
"weapons/rocket1.wav" "ambience/alien_hollow.wav"
"weapons/rocketfire1.wav" "debris/beamstart4.wav"