Halo 3 is more popular then any Call Of Duty In fact, Halo 3 is the best selling FPS of all-time :\
Call of Duty Black Ops.This is because Call of Black Ops has came into a later year making it have more improvements but Halo 3 is a older game. But a very good match against Call Of Duty BlackOps is Halo Reach.
Halo 3
AnswerHonestly, more people play Call of Duty. A good decent amount of people still play Halo though.
Call of duty is more realistic than halo and contains more blood. Call of duty also allows you to knife so in many ways halo is more appropriate but it doesn't necessarily mean its more fun.
Call of duty easily, COD & Halo are the most popular FPS'
i would say call of duty because their are more new releases of it. eg: call of duty 4, call of duty 4.2. etc etc etc
Halo 3 is way better because it is way more creative,has better guns, better places and has way more glitches and better ones than call of duty's if it even has any so call of duty sucks Remember Halo 3 rules Call of duty drules
I would recommend Halo 3 over Call of Duty: World at War. I say this because the gameplay is more competitive and varied in my opinion.And Halo is less bloody and more fun.
Call of Duty Black Ops. i have played both and halo reach doesnt make sense. also black ops is more realistic
MW2 for sure.
no call of duty has two companies working on it and way more games than halo and the multiplayer mode has combat training if you need help playing but that's the just the beginning of it