This map works best on Half-Life 2 and Half-Life 2: Episode One but can also be played in Half-Life 2: Episode Two.

First extract the contents of this archive into:
Steam/steamapps/USERNAME/half-life 2/hl2
or
Steam/steamapps/USERNAME/half-life 2 episode one/episodic
or
Steam/steamapps/USERNAME/half-life 2 episode two/ep2

Then open the game and type "map drainage1" into console without quotes to play the map.
