Halo 4 is the "best-selling Microsoft Studios title ever in the U.S. market,*" performing better than Halo 3 did during its fiscal launch year, according to ol' Microsoft. That all-important asterisk denotes that claim as being "according to Microsoft retail sales sell-through data for each respective fiscal year."

Presumably, this means that Halo 4 has also outperformed other Microsoft Studios launches, such as Fable 3 or Forza Motorsport 4. It's no wonder, then, that Microsoft has decided to expand the Halo series' current "Reclaimer" trilogy into a "saga," a term that translates to "as many games as we feel like" or "why on Earth would we ever stop," depending on the dictionary you're using.