Half-Life 2's Multitude Of Purchase Options

Thanks to ShackNews for their post explaining the multiple ways consumers can buy Half-Life 2, summing up a confirmed email/forum post by Valve's Gabe Newell following much false information. The options are summed up as: "...a single-player only mass market version ('sold mainly at the Costcos and Walmarts of the world'), a traditional single/multiplayer version for places like EB Games, and a collector edition's version ('with lots of cool bonus stuff for people who like cool bonus stuff')... [and] Steam pricing plans", which will include one-time download fees, or "...pay a monthly fee and have access to all Valve titles", including Half-Life 2.