Thief

The Thief is Marathon's covert acquisitions specialist: a Runner Shell designed for players who want to loot aggressively, move fast through environments, and extract with a full backpack. Nicknamed the "loot goblin" of the Runner roster, the Thief's entire ability kit rewards accumulating valuable items and navigating the map quickly using vertical mobility. The more loot the Thief carries, the stronger they become, making efficient scavenging a direct gameplay advantage rather than just a secondary objective.

The Thief's Prime ability is the Pickpocket Drone, a pilotable drone that attacks enemies while forcing them to drop loot for the Thief to collect, turning combat encounters into loot opportunities. The Tactical ability is the Grapple Device, which fires a dart to hook onto surfaces and swing through environments, providing exceptional vertical mobility for reaching elevated positions or escaping engagements. Two passive traits round out the kit: X-Ray Visor highlights enemies and loot containers through walls, giving persistent information about the environment; and The Finer Things scales weapon handling and grapple recharge speed based on how much the Thief is carrying, rewarding a full backpack with better performance.

The Thief Runner Shell is ideal for players who prioritize loot efficiency and unconventional movement over direct confrontation. The primary weakness is the inverse of the strength: a Thief with an empty backpack loses the scaling bonus from The Finer Things, making early-match play less powerful. Players who enjoy movement-based gameplay, information advantages through wall vision, and building snowballing power through successful scavenging will find the Thief a uniquely rewarding Runner in Marathon.