Don't Make a Girl a Promise

Don't Make a Girl a Promise is an achievement in Halo: The Master Chief Collection. This achievement is obtained when a player finds the Cortana toy in the level Gravemind.

Trivia

 * The name is a reference to several quotes from the Halo universe: one from Halsey in The Package, one from Cortana at the end of Halo 2, and another from Cortana at the start of Halo 3. All of these quotes were said to John-117.