Be able to download community made maps and modes

Remeber reach when we can get the most popular community made content and have custom game nights, those were fun, if only we can do this on halo MCC.

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> Remeber reach when we can get the most popular community made content and have custom game nights, those were fun, if only we can do this on halo MCC.

Sadly, customs is one of the buggiest features :c such a waste