引用自 The Sandman：I bet it will be a prolouge to what happened in the events of porta 1 and 2. Maybe it will give us info about how Glados gained control of apperature. If so, you would play as a test subject who is trying to escape the test chambers before he/she is killed!
引用自 clonegunner237：I guess we'll just have to wait for when it comes out to find out what it'll actually be. (If a 3:rd comes out at all that is)