As hinted earlier, a new MP patch (1.04... or is it 1.4 ?) for Dark Messiah has been released today and can be downloaded via Steam.

"This patch introduces the new Colosseum Mode and the SDK as well as bug fixes and balance adjustments for the main game.

New Content

New game mode - Colosseum
New map - clsm_circus
New map - CTF_3
New map - CTF_MP4
New map - CTF_MP2
SDK map compile utilities & documentation
Source Data for all Kuju MP maps"


You can read the complete release notes in the forums.