The Untouchable medal resembles a platinum and gold bulls-eye target sitting on top of a sixteen pointed platinum star; it is awarded to individuals after killing 25 opponents in a row without dying on multiplayer matchmaking, or after killing 50 opponents in a row without dying on firefight or campaign in Halo: Reach and Halo 3: ODST.
The Untouchable medal is the fifth of the spree medals in Halo: Reach, Halo 3, Halo 3: ODST, and Halo 4. This medal can be awarded on any gametype, and is assumed to have a Bungie rating between 9/10 and 10/10 - meaning this medal is very difficult to achieve.
- 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.