Thriller

Thriller is a Halo: Reach medal that is awarded to players whom have infected 15 humans without dying. It is represented by a skull in the middle of a Running Riot medal. It appears on the Reach Service Record.

Trivia

 * This medal can only be unlocked in a game with 16 players, with one as the zombie.
 * It has replaced the Mmmm Brains medal, as the hardest Infection medal.
 * This medal is a reference to Michael Jackson's song "Thriller".