Yesterday, one man offered to buy "old builds HL2". I dont even know, to believe this or not believed. But, he says that he has four build circa 1998-1999, GoldSource Era. The latest "Half-Life 2 Build 4" contains full story & end, takes about 2-4 hours gameplay and fight with big head (perhaps Consul). Now cons. He doesn't give any screenshots, another contents which significantly would say: that it is real.