BRIEF SUMMARY
Codex Lore: TRUTH/LIES 3/6
OBJECTIVES
NO TACTICAL OBJECTIVES ASSIGNED TO THIS NODE.
TRUTH/LIES 3/6
ANALYZING… FILE TYPE: UESC Internal Report PERIOD: Present Day TOPIC: Hazardous Specimen SUMMARY: Classified report detailing the key attributes of a hazardous specimen unit discovered by the UESC in the ruins of the New Cascadian colony. Several key details have been redacted by the UESC. =================================================================== File: UNKNOWN SPECIMEN UNIT #325 Description: A Class-L specimen containment unit, standard among colony supplies. Unit is damaged, deformed along its seal and with visible external wear. The container appears to be leaking, though there is no discernable puncture. The substance within is of an unknown composition. It is suspected to be [REDACTED] in origin, contained by UESC officials during the colony's operation after the [REDACTED] event. The unit occasionally emits sound. Additional Details: The substance inside the unit distorts the area around it visually. The substance fluctuates in size and appearance but follows no clear rules in its fluctuations. The auditory experience of the unit differs depending on the observer. It has been described variously as "like music," "like a wasp's nest," "like a familiar voice," and "like a migraine." One officer has been medically quarantined after contact and several others detained for psychological observation. Protocol: Use extreme caution. Unit must be contained if it can be approached safely. =================================================================== TYPE: TEXT [X]; AUDIO [ ]
About Codex in Marathon
The Codex is one of the most important progression systems in Marathon because it keeps track of the things that stay with your account over time. It covers achievements, collections, lore entries, cosmetics, titles, and other rewards tied to what you do in the game, and you can check it outside of your runs.
What makes the Codex stand out is that it is not just a lore menu. Marathon connects it to contracts, narrative items, and other in-game milestones, so the more you explore and complete, the more entries and rewards you unlock. It also carries over between seasons, even when things like gear, faction progression, contract progression, and player level reset.
FREQUENTLY ASKED QUESTIONS
The Codex is Marathon’s long-term progression hub. It tracks things like achievements, lore-related discoveries, cosmetics, titles, and other milestone-based rewards, and it can be viewed outside of runs.
The Codex keeps a record of what you have completed and found in Marathon. That includes progress from contracts, narrative items, and other achievements, along with the rewards tied to those goals.
Yes. Codex progression carries over between seasons, which makes it one of Marathon’s main long-term systems even when seasonal resets affect gear and other progression.
The Codex includes free cosmetics and other unlocks tied to objectives. You can get rewards like weapon styles, stickers, profile emblems, profile backgrounds, titles, runner shell cosmetics, and loadout packages.
Codex entries are unlocked by doing things like completing contracts, finding narrative items, completing objectives, and hitting other in-game milestones. As you keep playing, more entries and rewards open up.
The Marathon Codex page helps you understand what the Codex is, how it works, what kind of rewards it offers, and why it matters for long-term progression. It is also a useful place to get a simple view of the game’s achievement and reward tracking system.