Nine Lives Are a Myth
From Halopedia, the Halo wiki
Nine Lives Are a Myth is an achievement in Halo: The Master Chief Collection. It is awarded by beating the 20,000 point par score on New Alexandria in Halo: Reach. Though it can theoretically be unlocked on any difficulty, more points are awarded in campaign scoring when playing on higher difficulties.
The name of the achievement is reference to how Catherine-B320 died in the New Alexandria in Halo: Reach.