The Inconceivable medal resembles a red and pink bullseye target sitting on top of a fourteen-pointed (originally thrity-two) red star; it is awarded to individuals after killing 35 opponents in a row without dying on multiplayer matchmaking and Halo 4 Spartan Ops, or after killing 500 opponents in a row without dying on firefight or campaign.
- When a player receives their 35th kill in a row, the kill feed will not announce the last player killed, and will instead display the medal.
- It has been proven that the highest spree possible is 255 kills. Even if you get more kills after that number, without dying, it will still say that your highest spree was 255 kills. This is most likely because 255 is the maximum value representable by an eight-digit binary number, and therefore the maximum representable by an unsigned 8-bit byte.