Enter the mind of Filip Valkas, who lost his parents in the Seven Hour War, and take your revenge on your Combine captors in a new story centred on the Half-Life Universe. Pick up your own crowbar and force your way out of Citizen Containment Zone 19, and lead in the uprising against the alien agressors.
Impressive! I felt like these levels were made by Valve. Nice storyline similar to Route Kanal, nicely done locations. And it was quite difficult to finish it on Hard - there were very few med aids and I was always short on ammo. Had to play with care.