SPARTAN OPS CHALLENGE 1 day only and award is avatar tee shirt

Starting April 11 at 2:00 a.m. PST and ending April 12 at 2:00 a.m. PST, play and complete any 5 missions of Spartan Ops and receive an exclusive Avatar tee*. You can also replay your favorite missions from Spartan Ops Season One as Matchmaking for the entire season begins anew, starting with the first episode on April 8, 2013.
*To receive avatar item, you must play and complete 5 different Chapters of Spartan Ops on Halo 4 standard edition while connected to Xbox LIVE, any time between April 11 2013, 2AM PST and April 12 2013, 2 AM PST. A download code will be sent to your Xbox LIVE messages inbox associated with your Xbox LIVE account by June 1, 2013; Limit one avatar item per gamertag. Xbox LIVE Gold membership required for Halo Infinity Multiplayer (sold separately). Offer available to users 17+, in all Xbox LIVE countries except Italy, and is non-transferable, not redeemable for cash, and cannot be combined with any other rebate or offer. In New Zealand, only adult accounts (18+) can download or stream content over the Xbox LIVE marketplace. Taxes, if any, are the sole responsibility of the recipient. Download charges may apply as set by your ISP. For Xbox LIVE Terms of Use and system requirements, see www.xbox.com/live. Offer provided by: Microsoft Corporation, One Microsoft Way, Redmond, WA 98052.