Item description:

This is a Half-Life 2 single-player mappack of 4 maps.
The map works best on Half-Life 2 and Half-Life 2: Episode One but can also be played in Half-Life 2: Episode Two.

This mappack tells a story of a man who finds himself in a dark drainage after escaping two combines. His journey takes him through a sewer system that is now ridden by headcrabs and zombies. Later he catches the attention of combine forces while driving through canals with a water boat. The action gets hectic when the combine try to stop this rebelling citizen.

This is an updated version that was released on January 16th, 2013.
The original was released on April 22nd, 2007.