Having trouble playing the recently released Halo: Reach Defiant map pack? You’re not alone. A bizarre tech issue has reared its head. The problem is linked with the number of Marketplace Content items you can have active for Halo: Reach at any one given time (currently, three content items). So if you’re breaching that limit with exclusive armor, Bungie Pro, or other map packs, the Defiant pack won’t function correctly.