Boomtown and Fappin offer first reports out of Microsoft's X03 event that's underway in the south of France of a publishing deal between MS and Epic Games and Epic's Scion subsidiary. No specific titles are mentioned, but indications are that games covered under the agreement will be for Windows and Xbox only. Here's a bit from the press release on Fappin:

Epic Games and Scion Studios to Create Exclusive Xbox and Windows Games, To Be Published By Microsoft Game Studios

JUAN-LES-PINS, France, 16th September 2003 —Tonight at X03, Microsoft announced a partnership with Epic Games, developers of the legendary Unreal® series of games and the Unreal® Engine. Epic Games and its recently-formed Scion Studios will develop several new games exclusively for Xbox and Windows. The to-be-announced products will be published by Microsoft Game Studios.