Parts 12 and 13 of the Half-Life 2 Developer Commentary series bring the game to its climactic finale with “Our Benefactors” and “Dark Energy.” These chapters offer a sharp tonal shift ...

Half-Life 2 villain Dr. Wallace Breen appeared throughout Half-Life 2 and was seen falling to his death after Gordon Freeman destroyed the reactor at the top of the Citadel.

Breen and the Combine's architecture were more sinister and overbearing as well. The demo shows off early versions of major NPCs like Barney and Alyx, as well as an almost-unrecognizable Dr. Kleiner.