Halo 3: ODST

Halo 3: Keep It Clean is a campaign expansion to Halo 3. It takes place in Mombasa, Kenya, presumably during the events of the First and Second Battle of Earth.

bungie loves all noobs so this game will be for all the noobs who couldn't beat halo 3 and are all terrable

Trivia

 * A teaser trailer for Keep It Clean was released at 07:07:07 am PST on September 25th, 2008, the one year anniversary of Halo 3. The trailer was viewed through the many security cameras around New Mombasa.
 * The final words "Prepare to Drop" may refer to the Helljumpers who use Human Entry Vehicles to drop to the surface. This may mean that the expansion may take place from the point of view of a Helljumper, not a SPARTAN-II.