You have been awoken from your Relaxation vault and sent to the "H.E.R.T. Application" track. you are going to be in the Human Emergency Response Team. Very Reminiscent (haha) of Portal: Revolution. But this time, it's for real. The lower parts of the faci...

The H.E.R.T. Application testing track will utilize extensive Single-Portal exercises so that test subjects can think out of the box with only one portal....

Due to some test chambers out in the field being knocked sideways, the H.E.R.T. Application track will prepare you for disorienting scenerios....

Some faith plates way not work correctly today, the core in charge tells you over radio....

It's breaking. It's all about to come crashing down on time itself. There's not much time left. Go....

You're back! The Aperture Science Time Machine is breaking down. I don't know how much time is left before you go back. But we will still fufill our goal of saving the old and small testing tracks. I will help you as much as I can. Welcome to the Human Eme...

Welcome to the testing track you will be saving! It mainly uses repulsion gel and reflection gel. Good Luck!...

This is it. Your second test camber in the track you are trying to save. Good Luck....