Killimanjaro

The Killimanjaro Medal (Kilimanjaro, Killimanjaro, Killimanjaro) is awarded for killing 7 opponents within 4 seconds of each other. If you were to get one barely under the time requirements, you would have to get 7 kills in just under half a minute. It is available in all Multiplayer gametypes and is assumed to have a Bungie difficulty rating of 10 out of 10 since the Killtrocity Medal has a difficulty rating of 9 (out of 10). It is represented by a platinum circle with 7 yellow-gold stars. This medal is seen very rarely, and most often in custom gametypes, or in Halo3 Grifball. Since Bungie has released no information on this medal, an image had to be lifted from a set of post game stats. When someone gets this medal the announcer will shout "Killimanjaro!" to the player that received this medal. The name is a play on the African mountain, Kilimanjaro.

See Killionaire for an easy way to get this medal