What would Half-Life 2 have been like if we had gotten the version shown to us in the official promotional materials? Coterminus attempts to answer that question as well as provide a platform for others to make mods based on Half-Life 2 cut content.
The Iconic Hazard01 Test map By Marc Laidlaw, Remastered By me.
The author of the map from the HL2 beta map is Marc Laidlaw, the story writer of Half-Life. According to Marc Laidlaw, this map was not related to game's storyline and was his attempt to create something surrealistic in the game. And This just Details the map, Adds music, And Makes it an actual tutorial.