In the finished Half-Life 2, there's a section where Gordon and Alyx are fighting through City 17 trying to reach Barney, and come to a destroyed bridge. You end up dropping down to the canal before a ...

and two to three before the infamous Half-Life 2 beta that leaked in 2003. It's a distinct point in the game's evolution, with graphical elements reminiscent of both Half-Life 1's GoldSrc and the ...