The Marathon wiki

Codex:Career
->  Codex:Season Levels (empty)
->  Codex:Feats of Mastery
    ->  /Orientation
    ->  /Legend (empty)
->  Codex:Titles (empty) 
Codex:Loot
->  Codex:Weapons (empty)
->  Codex:Combat Utilities
    ->  /Equipment
    ->  /Consumables
->  Codex:Acquired Items
    ->  /Salvage
Codex:World
->  Codex:Perimeter
    ->  /Orientation (1 entry)
    ->  /Exploration
    ->  /Collectibles
        ->  /Grievance Log Record
        ->  /...
->  Codex:Dire Marsh
    ->  /Orientation (1 entry)
    ->  /Exploration
    ->  /Collectibles
        ->  /Class B Anoumalous Material
        ->  /...
->  Codex:Outpost
    ->  /Orientation (1 entry)
    ->  /Exploration
    ->  /Collectibles
        ->  /Personal Log: General Reed
        ->  /...
->  Codex:Threats
    ->  /UESC
        ->  /UESC Recruit
        ->  /UESC Grenadier
        ->  /UESC Grenadier CMDR
        ->  /UESC Assault Trooper
        ->  /UESC Assault CMDR
        ->  /UESC Ghost
        ->  /UESC Ghost CMDR
        ->  /UESC Scout
        ->  /UESC Scout CMDR
    ->  /Tau Ceti Flora and Fauna
        ->  /Ticks
->  Codex:Activities
    ->  /New Cascade Colony
    ->  /UESC
Codex:Factions
->  /CyberAcme (1 entry)
->  /NuCaloric (1 entry)
->  /Traxus (1 entry)
->  /MIDA (1 entry)
->  /SekiGuchi (1 entry)
->  /Arachne (1 entry)
Codex:Runner
->  /Vandal (3 entry)
->  ...