Darkness... My body hurts! Or is it my brain? The explosion! I remember it now. Maybe I'm in a coma? Or even worst, I may be already dead... Everything is so confusing... Zombies, monsters and ghosts from the past are filling my mind... Oh God, so many memories mixed with my dreams! I can't even distinguish them anymore. What if my entire life was just a nightmare? But it felt so real... Wait, what's that sweet voice? Sounds like a nurse! THAT is part of reality, I am sure. Now if I could just concentrate on this voice and try to wake up...
It's a very fun mod, and it can be scary at times. Even so, the story feels vague and it borrows many situations from the original Half-Life.
Play it with the High Definition pack, seriously. Otherwise, you'll just be playing HL with zombies.