As noted on Atari UK, a demo is now available for Act of War: High Treason, offering the chance to check out the upcoming expansion for Eugen System's real-time strategy game. The update includes single-player and multiplayer support for a 752 MB download, available via FTP (direct link), and mirrored on 3D Gamers, Boomtown, Computer Games, FileFront, Gameguru Mania, Gamer's Hell, GameSpot (registration required), VGPRO, and Worthplaying.