Okay, okay... despite flat statements to the contrary from the developer (something along the lines of it is not Marathon 4 , if I recall) and the serious mismatches in timelines and terminology, Game Girl Advance has advanced the theory that Halo really is the sequel to Marathon Infinity, citing the use of the Marathon logo and the basic similarities between the two games. You be the judge.

Thanks to Louis Wu, who also differs with GGA on this point.