All Marathon Runner Shells, explained

In Marathon, every player becomes a biosynthetic shell designed to help survive Tau Ceti IV. These are known as Runner Shells and are a core part of how you play the game and approach combat encounters.

Runner Shells are archetypes or classes in Marathon that have dedicated abilities and determine your playstyle. There’s a Shell for stealth, intel gathering, healing, and more. You can then expand on their base kits using cores and implants. Cores are designed for a specific archetype and can alternate their abilities, while implants are universal perks, creating a buildcrafting sandbox like no other extraction shooter.