Game, Set, Match

Game, Set, Match is an achievement in Halo: Reach. It is unlocked by completing a Firefight set on Legendary difficulty without dying once.

Tips

 * The easiest way to obtain this achievement is by setting the Firefight options to invincibility for players, no round limit, and bottomless clip on any Firefight map on Halo: Reach.

Trivia

 * The achievement can be easily completed by changing the Spartans' Base trait from having "100% Shields" to "Invulnerable".