Heavy Rain overall because I would actually agonize over decisions I was so immersed. I couldn't even finish the fourth trial and my hands were shaking after the oncoming traffic part.
Also the ACiT ending made my cry tears of joy and sorrow back to back. That's the only story that's ever managed to make me do that.
Get Your Portable ID!Lord of Ratchet and Clank
Duke of Playstation Plus
Warden of Platformers