Halo 3 achievements

Halo 3

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There are 79 Halo 3 achievements (49 without DLC) worth 2,658 (1,750)

298,393 tracked gamers have this game, 19,647 have completed it (6.58%)

Achievement Details

Marathon Man in Halo 3

Marathon Man71 (40)

Locate and access all Terminals in the Campaign.

  • Unlocked by 94,705 tracked gamers (32% - TA Ratio = 1.77) 298,488  

Achievement Guide for Marathon Man

203,451 (128,462)
Achievement won on 08 May 10
TA Score for this game: 2,658
Posted on 08 May 10 at 13:04
This solution has 117 positive votes and 8 negative votes. Please log in to vote.
Guide by Eternal from X360a.org :
Note #1: You have to wait for the "Fragment Ends" message to come on before the game registers that you've got the terminal. The only exception is Terminal #2 on the level "The Covenant," this one does not give that message. Hit the A-button to scroll through a few messages, then the terminal will turn red and a few more screens will need to be read before the "Fragment Ends" message appears.

Note #2: These can be done in any order and you do not have to finish the level. It is suggested to do them all on the same difficulty. Access the terminal, wait for the end message, then you can save and quit the level.

The Ark:

1. Start the mission and once you enter the first building take a left into another door and now you should be in a curved corridor. On the inside is a Terminal.
2. After activating the bridge to let your comrades across the gap, do a 180 and you should see it. *it does not open until you activate the bridge*
3. In the third building after defeating the scarab, kill the group of sleeping covenent, then follow the corridor downwards. Once you reach a door in front that is locked, immediately on the left there's an open door. Go through and walk straight off, then do a 180 to find a secret room. It is in there.

The Covenant:

1. When in the first tower standing on the lift, face the access panel and turn left. Jump over and it's right there.
2. Land your hornet on the second tower, walk towards the entrance but when you see the locked door, do a 180. Should be right in front of you.
3. When in the third tower standing on the lift, face the access panel and turn right. Jump over and it's right there.


1. After reaching the end of the first cave, hug the right wall and you will see a building. Jump up onto the walkway and hang a left once inside. It's right there.
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