Here is my latest video with all 7 terminal locations for you in halo 3. Finding them all will unlock the 40g "marathon man" achievement. Good Luck!
I did all the terminals and the achievemant did not show up, It kicked me out to a new file wrtiien by didact. but neither me or my friend got the acheivement but we found all terminals.

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More by GruntSoldiers:Halo 3 - All 3 Mythic Map Skull Locations Gears of War 2 All 41 Collectible Locations Halo 3 - Vidmaster Challenge : Annual Tutorial 
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