Guide
Saros: How to Unlock Locked Doors and Containers
Discover how to unlock Locked Doors and Containers in Saros, including what lies behind them, and whether they are worth it.
During your every cycle (run) in Saros, you will come across several locked doors and containers (yellow). The locked doors lead to a potential loot, containing health, Lucenite, and containers, which can help you push further in the cycle. Moreover, as you progress through the biome, you will come across locked containers. These are yellow containers and cannot be opened like the regular blue ones. Opening these containers can help you in the run, as they drop a Power Weapon of your current Proficiency Level. However, it can be confusing at first how to unlock them. In this guide, we will tell you how to unlock Locked Doors and Containers in Saros.
Related Article: Best Beginner Tips and Tricks in Saros.
How to Unlock Locked Doors and Containers in Saros

Although the Locked Doors and Containers are different things, they both require the same solution, Carcosan Key. Carcosan Key is a key item that you can use to unlock the Locked Doors and the Containers you come across. However, each key is one-time use, so you have to find more to unlock more containers and doors throughout the run.
Carcosan Key is a random drop from the white/blue containers. Moreover, some enemies also have a chance of dropping it after you defeat them. Fortunately, you can pick up multiple Carcosan Keys at a time, allowing you to open the yellow containers and locked doors in your progression route.
Now, it is possible that you run past a locked door without noticing it. The best way not to miss any door is to keep an eye on the mini-map. If you see any grey icon on the mini-map, it is either a room blocked off by a red shield that you can punch through or a locked door. If you have a Carcosan key, interact with the locked door by holding Triangle to open it.

Now, when it comes to opening locked containers, I recommend that you only do so when you are in need of a powerful Power Weapon. As this container always drops a Power Weapon of your current Proficiency Level, it is more worthwhile when you are getting a difference of at least 5 levels.
Lastly, I would like to mention that there are five nodes in the Armor Matrix that grant a Carcosan Key at the start of every cycle. If you unlock all five of these nodes, you will start with 5 Carcosan Keys in every run. This way, you will be able to unlock doors and containers without needing to backtrack.
