Securement Silo Sigma walkthrough – Once Human

As you reach the late game in Once Human, you may need to start farming for better mods for your gear. Securement Silo Sigma is the first of these Silos, and here’s how to complete it solo.

We’ll also cover all the secrets and hidden loot spots, to make sure you don’t miss anything.

Where is Securement Silo Sigma in Once Human?

Securement Silo Sigma is located in the Broken Delta (4898,-5397) and is near the Railway Junction area. There’s also a nearby Teleportation tower that makes getting there quite convenient.

What drops in Securement Silo Sigma?

You can get rare and epic Chest armor mods on Normal, and legendary Glove armor mods on Hard and Pro. You’ll also normally find plenty of crates to loot, which contain various rewards. Finally, you’ll also get Energy Links, Stardust Source, and armor mod parts.

How to clear Securement Silo Sigma

Simply run straight ahead as you enter and you’ll reach an area with a few guards. Hit Q here to see if there’s a storage crate to your right between some servers (I’m assuming that’s what they are?).

Take out the guards and enter the next room, and look out for the sniper. There are also four additional guards that will enter the room from either side. Once you’ve dealt with everyone here, move on to the next room, where you’ll find an elite enemy. Take them out along with their guards, and be careful of the turret above and to your left as you enter the room.

Grab materials from this room, there’s usually a storage crate as well, and don’t forget to loot the elite enemy for the V3 Rosetta access card.

Continue on and you’ll find yourself in a hallway with a vent to your left. At the end of this hallway are rooms that sometimes have guard in them, as well as storage crates and a weapon crate.

Once you’ve collected those, head back to the vent and enter it. Go through the vent to the far side where you’ll turn right, and then take your first left where you’ll find a ladder. Climb it and then take a left.

You’ll find yourself in a room with a few more guards. As you enter the room, there’s a ladder to your left. Once you’ve taken out the guards, climb the ladder to potentially find another enemy as well as some loot.

Once you’re done, re-enter the room and make your way to the opposite side, where you’ll find a door with a control panel. This is the way to the secret boss in Sigma. Access the door and enter the next room, where you’ll see a wish machine. Activate it to start the challenge.

How to beat the secret room at Sigma

To get the reward for this secret area, you’ll need to stay near the wish machine within the circle around it while fighting off enemies. Eventually, a Claw Machine will appear. He’s tough, but thankfully you don’t have to stay in the circle the whole fight.

Feel free to move around until you’ve defeated the boss. Afterwards, stay in the circle again until “Charging” has reached 100. You’ll then be able to claim the reward for this room. Be sure to also check the room, as a gear crate spawns in here sometimes.

The boss at Securement Silo Sigma

Now all you have to do is head back to the previous room, head up the stairs, and take a right. The boss will be waiting here for you on your right-hand side. The room across from you as you enter contains a storage chest and some materials, so remember to grab those before you leave the dungeon.

The boss is pretty straightforward on Normal – just burst him down. On hard and Pro, I suggest taking out the other guards in the room first (including some tough enemies). Once you focus the boss, he will gain immunity, at which point you’ll have to use Gatling Guns in the room to remove his shield.

This can be complicated if the other enemies in the room are still alive.

After beating the boss, there are several storage chests and loot bags in this room, so be sure to hit Q and pick all of those up.

And that’s really all there is to it. I don’t recommend using a controller on Normal mode, unless you’re looking for a specific Chest Mod (for the Shrapnel Build, for example).

When you’re ready for the next challenge, check out my guide on how to clear Securement Silo PHI, where things get just slightly more challenging.

If you have any trouble here, I have a full guide on the Shrapnel Build that’ll make you more powerful in Once Human.