Marathon Man

Marathon Man is a Halo 3 Achievement, which is awarded for accessing all the Terminals in Campaign mode and can be completed on any difficulty. The achievement is worth 40 Gamerpoints. It is represented by a person with a Marathon symbol for a head, surrounded by a yellow circle and with seven yellow stars (representing the seven Terminals) above him. It is a reference to Bungie's earlier Marathon games, in which Terminals were an integral part of the campaign levels: they functioned both for providing storyline, guiding the player, and transporting the player to the next level.

Method

 * After you access the terminal, you need to wait for the screen to go red then wait until the screen shows another text message and finally press A to scroll down to the very last message (a fragment from a Forerunner message) to show up to get the achievement.
 * To access the terminal you must "flip" through the terminal until it redirects you then you read through the last pages, then wait a few seconds for the screen to turn red and another fraction of message to show, then leave.
 * For some players, the achievement will only be unlocked if the seventh terminal is accessed last.
 * A player must access seven terminals, another seven reference (there is an additional eighth one on Cortana, but this isn't necessary for the achievement).

Trivia

 * Marathon Man was a movie made in 1976.
 * Marathon Man is very similar to Halo 3: ODST ' s Audiophile achievement, as well as the achievement Hats off to 819 in Marathon: Durandal, the Xbox 360 re-release of the second Marathon game.
 * There is a bug that when getting this achievement sometimes will grant the player Security shoulders.
 * In the Nintendo game Super Smash Bros. Melee, there is a reward of the same name awarded if the player runs more than they walk.