Halo: The Master Chief Collection achievements
20,304
(6,000)

Halo: The Master Chief Collection

4.5 from 14811 votes

There are a maximum of 600 Halo: The Master Chief Collection achievements (400 without DLC) worth 20,304 (6,000)

200,711 tracked gamers have this game, 979 have completed it (0.49%)

Achievement Details

The Key in Halo: The Master Chief Collection

The Key17 (10)

Halo 3: Complete Cortana.

  • Unlocked by 69,026 tracked gamers (34% - TA Ratio = 1.70) 200,854  

Achievement Guide for The Key

AuthorSolution
Apache117X
461,274 (287,351)
Apache117X
Achievement won on 13 Feb 15
TA Score for this game: 14,756
Posted on 07 February 18 at 21:27, Edited on 07 February 18 at 21:30
This solution has 3 positive votes and 0 negative votes. Please log in to vote.
This is a campaign related mission for MCC: Halo 3.

To obtain this you must finish the mission Cortana. Mission difficulty doesn't matter.

However, you must be carful if using skulls as some may void the achievement, these skills have a warning on them before you start the mission (anything with a 0.00 multiplier).
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