Figured I'd share this one. I've just finished replaying Portal, after being drawn back in with Portal 2 trailers. This ringtone is based on 3 sounds from the turret.
First sound is the fizzle, when you drag one through an energy field, then goes "Hello?", and finally "Is anyone there?"
Welcome to the forums. I forgot the volume was cranked. Dogs jumped, I jumped. Lucky the neighbors didn't too!
I could see changing my alarm to "hello ... is anyone there?"
Haven't played that game in a while. Definitely a familiar voice.
Nice the last time I replayed portal was... a week ago :/
There is a very nice Portal sound board app on the market that has sounds from the first portal and a few from the up-coming Portal 2.
The best part of this sound board is the ability to long-press on a sound file and set it as a ring tone or notification tone.