Hello there! One map in EP1, or a part of it is based on an other map in HL2. I have screenshots to prove, but I don't know how/where to upload them. The two maps are in Follow Freeman, when you first meet the hopper mines, and the other one is in Urban Flight, after you defeat the Antlion Guard, and go through the puzzle sequence (room with explosives, elevator which falls down, barnacles on the ceiling) I wonder has anyone notice this?