Killionaire

Killionaire is a multi-kill medal (although considered a "special" medal by Bungie.net, as opposed to the "consecutive kills" medal row) awarded and achieved in Halo 3 Multiplayer for killing 10 opponents within 4 seconds of the previous kill. This medal is represented as a black hexagon with 10 platinum/silver stars. Unlike Halo 2's "Killimanjaro" medal, this does not repeat if you kill 11+ opponents within 4 seconds of the previous kill. This is the hardest of all multi-kill medals to achieve. However, when Bungie opened up the Grifball playlist on March 6, the medal became much easier to achieve, this can also be more easily achieved through using Team Swords on Multi-Team. Also note you can get the "Killing Frenzy" award after earning this.