It's Half-Life 2 week at Ars Technica! This Saturday, November 16, is the 20th anniversary of the release of Half-Life 2—a game of historical importance for the artistic medium and technology of computer games. Each day up through the 16th, we'll be running a new article looking back at the game and its impact. There has been some debate about which product was the first modern “triple-A” video game, but ask most people and one answer is sure to at least be a contender: Valve’s Half-Life 2. For Western PC games, Half-Life 2 set a standard that held strong in developers’ ambitions and in players’ expectations for well over a decade.