BRIEF SUMMARY
Codex Lore: CO-EVOLUTION 4/5
OBJECTIVES
NO TACTICAL OBJECTIVES ASSIGNED TO THIS NODE.
CO-EVOLUTION 4/5
ANALYZING… FILE TYPE: Medical Record PERIOD: Present Day TOPIC: Metabolic Summary SUMMARY: SIMbiont metabolic test results, extracted from your shell's combat data. Forwarded by Nona as "a gesture of good faith." Per CyberAcme corporate policy, this summary has been scrubbed for potential infosec hazards. Addendum by ONI. =================================================================== Due to your participation in SGT-P1-75706C696674, you are entitled to the following metabolic summary from Sekiguchi Genetics. This data is not intended for diagnosis of shell function or pathology, and Sekiguchi Genetics does not accept legal or medical responsibility for actions taken by the end user. Total fluid proteins: normal Synth-creatine: elevated due to increased twitch-fiber activity Fluid electrolytes: enhanced electrolyte absorption efficiency Hyper-dense blood glucose: elevated* Neural toxicity risk: elevated* ATP collapse risk: significantly elevated** *Within deployment tolerances for disposable shells **Exceeds deployment tolerances for disposable shells in Earth or artificial Earth-like atmosphere. Tolerances unknown for Tau Ceti IV. [RUNNER: The above report is consistent with my internal scans of your recent shells. Regarding ATP collapse risk, there is no reason to speculate that Tau Ceti IV's atmosphere would enable you to withstand greater adenosine triphosphate depletion than under control conditions. While Sekiguchi can only monitor your physical shells, I can observe any effects on your digital consciousness, and I recommend you limit your exposure to the SIMbiont.] =================================================================== 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.