I haven't read all of the replies, so soz if this has already been said
Make it like Fallout:3/NV and have a whole galaxy to explore. Over 10 000 square KM of free roam-able world overall. That's it right now...
Hhmmmm...
The person above me doesn't have anything nice I can say about them.
The person below me is a biohazard threat that we must quarantine immediately.
the person above me is talking about my mask(its pretty creepy!) and the person below me has a toe infection which makes his toe look like a chicken leg!
Well, they are both good for different reasons...
Halo:
Pros:Aliens, Futuristic, I could go on for years but lets just say better.
Cons:NO ZOMBIES!
COD:
Pros:ZOMBIES! weapon customization, etc.
Cons: **** coding for everything.