I know they aren't really based on anything similar, one being futuristic and alien and the other WWs 1 and 2 and now modern warfare. But they do have some similarities I prefer Cod.
i loved halo 1,2,3 then there was odst and that kinda sucked but i was like oh! yeah, i get to play the reach beta! but the reach beta sucked in my opinion.
and cod has stayed true to me since the beginning but really shined after the 4th and continues to rock.
Hey man I dont know about you but Halo is a series about skill. Not who haz the better class. get this even; Cod games assist your aim big time! how do you think the quick scoopers work. In fact do this, have a private match with a friend and aim down your sites. then have your friend run past you at a sort of close-medium range and watch the magic as your gun follows him for 2 seconds and quickly veer back.