Stellaris Sentry Array Guide

Sentry Array
Sentry Array is a Stellaris Megastructure first introduced in Utopia DLC. It is considered one of the most powerful, yet simplest structures in Stellaris. Basically what you get is a gigantic Listening Post which you can use to spy on the entire Galaxy once fully upgraded. Not only that, but you will be able to see the enemy fleet composition and movement long before they come anywhere near the borders of your empire. But first things first – let’s take a deeper look at how to build this Megastrucutre and what are some ways in which it influences Stellaris gameplay.

How to build Sentry Array in Stellaris?


Image Credits: Paradox Interactive, Stellaris

Sentry Array is, generally speaking, a late-stage game Megastructure. The reason for that is the fact that you need Galactic Wonders Ascension Perk in order to build it. We talked about this perk already since it’s the same one that is required for Ring World as well – another late-stage megastructure. To sum up what we explained in detail in our Orbital Ring article, in order to get Galactic Wonders you need to research Mega-Engineering first and then repair or build another megastructure. After that, you will be able to research Sentry Array tech and start building it.

Stellaris Sentry Array is a multi-stage Megastructure meaning that you start with building a Sentry Array Site and then you can upgrade it 4 times. Note that Sentry Array must be built around a star in a system that you control and can’t be built around the Ring World. Take a closer look at the Sentry Array building stages:

  • Phase 1: Sentry Site (5 000 Alloys, 2500 Unity) no effect 
  • Phase 2: Sentry Hub (10 000 Alloys, 2500 Unity) +10 base intel, +20 Hyperlane detection range
  • Phase 3: Sentry Spire (10 000 Alloys, 2500 Unity) +20 base intel, +40 Hyperlane detection range
  • Phase 4: Sentry Aerials (10 000 Alloys, 2500 Unity) +30 base intel, +60 Hyperlane detection range
  • Phase 5: Sentry Array (completed) (10 000 Alloys, 2500 Unity) +40 base intel, Galaxy-wide detection range

As you can see, in total, building a complete Sentry Array will cost you 45 000 Alloys and 12 500 Unity – but this is the base cost. You can decrease it in many ways, presumably the best one being taking Master Builders Ascension Perk before taking Galactic Wonders.

When it comes to the building spot, generally speaking, you should build the Sentry Array in a secure location as the range is huge anyway, and you will be able to see most of the Galaxy even before you fully upgrade it. The good thing is that it can be built in star systems with Orbital Ring around a planet (because it’s built around a star). So, the best thing to do is to build it around a heavily defended Orbital Ring if you want to max its defenses. Remember, this is one of your key strategic advantages in the late game and you don’t want the enemy to grab it easily – keep it safe, keep it hidden.

What’s the best way to use this Megastructure?

Sentry Array type humanoid
Image Credits: Paradox Interactive, Stellaris

As we said earlier, Sentry Array is a giant Listening Post. As you upgrade it, you will get more intel and more parts of the Galaxy will be visible to you. So the real question is – how do you exploit this? Well, the first thing that you want to do is to monitor enemy movement and identify the choke points in their Hyperlane network. You also want to keep an eye on Gateways that they might be using as the last thing you want to happen is for the enemy fleet to backdoor you. You will also be able to analyze their fleet composition and the enemy ship design.

However, the greatest benefit of having a fully upgraded Sentry Array comes when dealing with the End-game Crisis. Seeing their Doomsday fleet stack is an enormous advantage, and some players even complained that it’s so OP that it actually makes the game too easy. As soon as the vanguard of the Crisis appears, you will be able to spot it and head toward it. Furthermore, you will be able to deal with their fleets one by one as you will have the full vision of the galaxy.

Final thoughts on Stellaris Sentry Array

Sentry Array type 3
Image Credits: Paradox Interactive, Stellaris

Sentry Array will allow you to see the entire Galaxy – and even further as you can actually see the compositions of enemy fleets. This offers a great tactical advantage and providing that the cost is not an issue, you should go for it. However, if you are in a very late stage of the game and are confident that you can predict the movement of end-game crisis, or have enough Gateways to cover distant parts of the galaxy, then you should invest your resources into something else. Thank you for reading and good luck in becoming space NSA!


  • Dragon Tribe in Hearthstone Battlegrounds

    Dragon Tribe in Hearthstone Battlegrounds

    In this guide, we will go over all the Dragon minions and explain in a bit how they work with each other, focusing on synergies and overview of each minion. You can find the full builds in our lengthy Hearthstone Battlegrounds strategy guide, we will be focusing only on individual dragons here. There is usually…


  • Quilboar Tribe in Hearthstone Battlegrounds

    Quilboar Tribe in Hearthstone Battlegrounds

    We are all aware of how strong and meta Quilboar comps in Hearthstone Battlegrounds are at the moment. In this guide, we will analyze every Quilboar minion and give tips on what you can do to utilize this tribe most effectively. Without further ado, check out the entire Quilboar tribe in HS Battlegrounds.  Tier 1…


  • Mech Tribe In Hearthstone Battlegrounds

    Mech Tribe In Hearthstone Battlegrounds

    In this guide, we will cover all the Mech minions and how they go in the overall mech comp. We will go into detail for each minion and explain a bit about how they interact with other mechs, as well as how powerful they are in the current meta. There won’t be any specific builds…


  • Naga Tribe in Hearthstone Battlegrounds

    Naga Tribe in Hearthstone Battlegrounds

    This guide will focus on Naga minions in Battlegrounds. We have already described meta builds and comps in Hearthstone Battlegrounds so you should check that one if you want to see the actual builds – here, we will analyze each minion and provide tips and tactics for you to use. Without further ado, check out…


  • Murloc Tribe in Hearthstone Battlegrounds

    Murloc Tribe in Hearthstone Battlegrounds

    In this guide, we will explain each individual Murloc from the Murloc comp, and go into a bit of detail on how they interact with the rest of the tribe, whether are they good enough, and how exactly should you play them. Note that this is not an overall build guide since we have that…


  • Elemental Tribe in Hearthstone Battlegrounds

    Elemental Tribe in Hearthstone Battlegrounds

    Welcome to this short Hearthstone Elemental tribe quick minion guide. We will try to be brief here as we have already covered Hearthstone Battlegrounds meta builds and elemental comps in our guide. In this article, you will find all Elemental minions explained and tips for each of them. As you all know, the usage of…


  • Hearthstone Battlegrounds Duos Advanced Guide

    Hearthstone Battlegrounds Duos Advanced Guide

    Welcome to the strategy guide for Duos mode in Hearthstone Battlegrounds. In this article, we will explain the basic and advanced mechanics of duos, go through all the new “Duos-only” minions, heroes, and spells, as well as strategies, build examples, synergies, and other relevant things that you should know to progress in this new mode.…


  • Orc-estra Removed From Hearthstone Battlegrounds Duos

    Orc-estra Removed From Hearthstone Battlegrounds Duos

    As we might have guessed, there was no time to wait since the game was pretty much broken with her in play – on April 22nd, Orc-estra Conductor has been removed from the minion pool in Hearthstone Battlegrounds Arena. This news came from official Hearthstone Twiter stating that “Orc-estra Conductor has been temporarily removed from…


  • Hearthstone Battlegrounds Strategy Guide [Season 7]

    Hearthstone Battlegrounds Strategy Guide [Season 7]

    Season 7 of Hearthstone Battlegrounds has begun on April 16th! We have seen many changes compared to the previous seasons. Just as a quick reminder, take a look at what previous seasons of Battlegrounds looked like in order to understand better what this season is about. In chronological order, the last few Hearthstone Battlegrounds seasons…


  • Monster Hunter Now: Charge Blade Armor Builds

    Monster Hunter Now: Charge Blade Armor Builds

    Charge Blade is one of the most superior weapons that was recently introduced in the Monster Hunter Now.  The weapon allows the player–hunter to charge the weapon, transform it into the axe, and unleash huge damage. Just like other weapons it has unique powers and is more and less effective against different monsters. In this…