Still playing Halo 4's multiplayer but haven't gotten any of the downloadable content yet? Well lucky for you there's a sale going on today where you can get them at a small discounted price.
The War Games Map Pass is running for 1600 Microsoft Points, originally 2000 MSP. If you'd rather skip out on the full season pass however, then you can get the Crimson Map Pack or Majestic Map Pack for 600 MSP each, a savings of 200 MSP each.
The only pack not on sale here is the Castle Map Pack, but that's probably because it just came out this week.