The biggest hit was "ModernWarfare 2", released in November, which became the fastest-selling game in history, selling 7m copies worldwide on its first day.
Beyond their Settings, what these future-war games have in common with the ModernWarfare series is a refusal to forthrightly acknowledge the inspiration for their subject matter.
But the ModernWarfare series has demonstrated that players have an appetite for games that purport to connect them to the wars their college roommates, or their sons, might be fighting in.