Microsoft and 343 Industries have revealed that Halo 5 requires a 9GB Day One patch before you can play online.
Anyone looking forward to diving into a fresh Halo multiplayer experience on October 27, will actually have to wait a little longer.
Halo 5: Guardians will require a 9GB Day One patch before the game's online multiplayer mode will function correctly.
Apparently, without the patch gamers won't even be able to play the Halo 5 multiplayer at all.
Halo 5 Studio Director Josh Holmes explained that the patch would include some "map content".
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The average 22.8Mbps UK internet speed means that the 9GB patch will take about an hour to download. But, if you've got a slower connection speed, you could be waiting hours until you're ready to get invovled in the Halo 5 multiplayer.
However, it is possible to download the patch before the game's release, which means even if you buy a physical copy of the game you can prepare it before October 27.
If you've pre-ordered a digital copy of the game, the patch will come bundled into the download. That brings the total size of the game to around 55GB though. Xbox One owners can pre-download the game so it's ready to go on October 27 too, if they've bought it directly from the Xbox Store.
Halo 5 is launching exclusively for Xbox One on October 27.