The Dark Messiah of Might & Magic single-player demo is now available, offering the promised sample of Arkane Studios' upcoming Source-engine first-person action/RPG based on the M&M series. The demo offers a tutorial along with the first level of the game, in exchange for a fairly startling 1415 MB download. The demo co-premieres on 3D Gamers and FilePlanet (registration required), and mirrors are now online on Boomtown (registration required), Computer Games, FileShack, Gamer's Hell, and Worthplaying.