The milestone was announced by Midway CEO David Zucker in a recent conference call. Sales milestones for both titles account for copies sold across multiple territories on several platforms.
Zelnick noted that while it may seem as though the PC gaming market is slowing, international PC sales continues to be strong in a number of markets.
"As we expected, our European PC sales of Unreal Tournament 3 are outpacing North America and, overall, the title is turning out to a success," Zucker added. "Later this year we are scheduled to launch the Xbox 360 version of Unreal Tournament 3 and expect it to perform equally well."
The CEO went on to say that Pipeworks Software's Rampage: Total Destruction (Wii), originally released in 2006, also broke the one million milestone.