Xbox 360 Geniuses! HELP ME PLEASE? (Halo 3)?

[cassieSWAGS.]

For Halo 3... I want to join a matchmaking party, and then I select a playlist, how come it tells me that " One or Two players (cause I'm also playing with my sister) Does Not Have The Map to play"? Why does it say that? And how can I get these maps? HELP!... and please, nothing rude! Thanks(= Thanks sooo muchh! Help is OHSOOO greatly appreciatedddd(= thankkk youuu[ ;

 

[urboyzzrl51]

you have to purchase the maps from the marketplace with microsoft points. you can purchase microsoft points at stores such as best-buy, wal-mart, radio shack, etc. you can play other play lists such as social slayer until you get the maps

 

[Just a guy]

when you read the description it will say something about DCLs. those are the maps that you need to download with microsoft points at the marketplace. For instance, if is says non-heroic DCL, you need everything but heroic.If it says Cold-storage DCL required, you need the map cold storage.