Not the good test subject is a Portal 2 map made with Hammer.
The story of this map is quite simple:
You are a test subject accidentaly woke up after Wheatley hitted your chamber in the chapiter "The Cold Boot". You crash in the facility of Aperture Science and trying to escape the facility by going through test chambers, but suddenly GLoDOS woke up, and start talking. But it doesn't seem that she's talking to you...
You can play the map (Portal 2 required) by clicking here.