The promised demo version of Half-Life 2 is now available as a hefty 751 MB download. The demo premiered on the ATI website, and mirrors can now be found on 3D Downloads, 3D Gamers, 4Players.de, ActionTrip, AusGamers, Boomtown (registration required), Computer Games, FileFront, Filerush (torrent), FileShack (registration required), Fragland.net, Gameguru Mania, Gamer's Hell, GameSpot DLX (registration required), and Worthplaying.