It might be years later, but Halo Infinite ... between Halo 4 and Halo 5, and delete herself after doing so. While she has memories of Chief giving her this task, the Spartan is unable to recall ...
Halo Infinite's development was notoriously ... Halo crossovers came in the form of a playable Spartan fighter in 2005's Dead or Alive 4. Available after beating every character's story once ...