Marathon Parasitism 1 Contract Walkthrough: 2026 Guide
- Game: Marathon
- Developer: Bungie
- Faction: Sekiguchi
- Contract Name: Parasitism 1
Completing the Marathon Parasitism 1 contract requires a structured walkthrough to ensure all objectives are met within a single deployment. As one of the priority tasks for the Sekiguchi faction, this mission demands that players navigate high-threat zones and manage complex clearance requirements to secure necessary items. At In Game News, we have compiled this wiki-style guide to assist players in navigating these objectives efficiently.
- Travel to the Processing point of interest and clear the rooftop of UESC Ghosts to collect combat data.
- Locate the terminal at the Pinwheel Base center to initiate the Data Bank retrieval.
- Acquire the necessary Yellow, Green, and Red Clearance Codes from random map locations and rooftop terminals.
- Extract the UESC Data Bank and deliver it to the DCON drop-off point.
Marathon Parasitism 1 Contract Walkthrough
The Parasitism 1 contract is a multi-stage objective that tests a player's ability to survive combat while managing inventory-based quest items. Because the contract mandates that all tasks be finished in the same run, failure to complete any portion of the mission will result in a reset of your progress. Understanding the specific locations of the UESC Ghosts and the mechanics of the Pinwheel Base is essential for a successful run.
For more strategies on faction-specific missions, check out our Sekiguchi faction contracts coverage to refine your approach. Players should prioritize inventory space before starting this contract, as the items required for the Pinwheel Base can take up valuable slots.
How to acquire combat data from UESC Ghosts in Marathon
The first step in this contract involves heading to the Processing point of interest. Upon arrival, navigate to the rooftop area. You will need to drop down to the lower level of the roof to find the UESC Ghosts. Engaging these enemies is necessary to obtain the two pieces of UESC combat data required for the mission. Once the enemies are defeated, ensure the combat data is successfully added to your inventory before proceeding to the next phase of the contract.
Where to find UESC Data Bank in Marathon Pinwheel Base
The most challenging portion of this contract is securing the UESC Data Bank from the center of the Pinwheel Base. Players must interact with a central tower to extract the data, but the base is locked behind a clearance system. If you are playing in a squad, this objective is significantly easier to manage as you can split up to search for the required codes.
Managing Clearance Codes
To unlock the Pinwheel Base, you must locate three specific types of Clearance Codes. These spawn at random locations, meaning players must be prepared to explore thoroughly during their run:
- Yellow Clearance Codes: These are found by interacting with terminals scattered randomly across the map. You may need to check multiple terminals before finding the correct code.
- Green Clearance Codes: These appear as random loot items found in the open world. Keep an eye on ground spawns while moving between objectives.
- Red Clearance Codes: These are obtained from specific terminals located on rooftops. After interacting with a terminal, you must wait a few seconds for the code to generate before it can be collected.
Once you have obtained all necessary codes, return to the Pinwheel Base center. With the terminal unlocked, you can retrieve the UESC Data Bank. Your final objective is to successfully extract and deliver the Data Bank to the DCON point. If you are looking for additional help with mission mechanics, see our Marathon wiki archives for more technical details on item spawns.
Frequently Asked Questions
How do you complete the Parasitism 1 contract in Marathon?
To complete Parasitism 1, you must acquire combat data from UESC Ghosts on the Processing rooftop, retrieve the UESC Data Bank from the Pinwheel Base, and deliver the bank to DCON in a single run.
Where can I find UESC Data Bank in Marathon Pinwheel Base?
The UESC Data Bank is located in the center of the Pinwheel Base, which requires specific Clearance Codes found at random terminals or as loot throughout the map to access.
How do I get Clearance Codes for the Pinwheel Base in Marathon?
Yellow Clearance Codes are found at random map terminals, Green codes are random ground loot, and Red codes are obtained by interacting with terminals on the roof and waiting for the download.