If you're looking to play Halo 4 online, make sure you've got storage space to spare. Microsoft says that, at the very least, you'll need an 8GB USB Flash Drive for the game's multiplayer.
"For an optimal experience playing with an Xbox 360 Hard Drive is highly recommended. For Xbox 360 4GB, Arcade and Core consoles, the Xbox 360 Hard Drive is sold separately," adds Microsoft.
Halo 4's multiplayer will feature a number of competitive modes called War Games. In War Games, players control custom Spartan-IV soldiers. These soldiers can be personalized with armor abilities, equipment loadouts, and unlockable specializations.
The multiplayer offering has a second major component: Spartan Ops. This new set of story-driven missions are playable in single-player or four-player co-op. Players will be introduced to the crew of the UNSC Infinity, and a new group of Spartans known as Majestic Squad.
Spartan Ops are at least one reason that you need a hard drive or flash drive. These missions will be released episodically after Halo 4's launch. It's impossible, then, for this content to be shipped on disc.
How much is 8GB of space? Well, let's put it this way: to download the entirety of Halo: Reach, you only need 6.57GB. On the other hand, 8GB is quite a bit less than the 22GB needed to install RAGE on your 360.
This is one of the downsides of a lengthy console generation: developers have to resort to awkward solutions to utilize the aging hardware. I can think of worse fates than mandatory installations but they do seem contradictory to the quick, convenient play that consoles generally offer. Thankfully this will probably be the last new Halo released on the Xbox 360, as the next Microsoft console is rumored for next year.