Alien Swarm Express Razor Train
I found an example vmf here: http://www.halfwit-2.com/?page=tutorials&id=42 converted to alien swarm and added a stop-start, and controls for ambient sounds: craneidleloop,train idle and train wheels, also trainhorn & razor horn. Model extracted from hl2 & ep1 gcfs. This took ages to get this working, finding a complete working model and getting the sound working (snd_rebuildaudiocache, was a lightbulb moment). Its even works from a VPK addon folder, with help from apairofkings.
I found an example vmf here: http://www.halfwit-2.com/?page=tutorials&id=42 converted to alien swarm and added a stop-start, and controls for ambient sounds: craneidleloop,train idle and train wheels, also trainhorn & razor horn. Model extracted from hl2 & ep1 gcfs. This took ages to get this working, finding a complete working model and getting the sound working (snd_rebuildaudiocache, was a lightbulb moment). Its even works from a VPK addon folder, with help from apairofkings.