first map I've made so its probably quite shit, you have to make your way through some kind of facility.
Music used is from:
BadWabbitz youtube channel: video titled "when memories break"
Instructions:
Just unzip the file and put it in your hl2 maps folder, then open Half life 2 and type "map PMbeta" in the console.
Also if when changing to the second part of the map the ai gets disabled just open the console and type "ai_disable"