There are two ways to get Lockbox Keys in Marathon. You can either: Between these two methods, you’ll likely find more Lockbox Keys than you can buy. Not only is the upgrade 2,500 Credits, but the ...

Crack open the caches.

Lockbox Keys in Marathon unlock special loot rooms marked by red flares. Here’s how to get them and where to use them.

Find rare weapons, upgrades, and salvage. Here's how to locate lockboxes and ensure you get the best loot every time.