Sentinels are hovering companions that follow their Tenno masters around and assist in various ways, dependent on the precepts used to program them. It is possible to program sentinels with precepts, or skill mods, that can turn a sentinel into an attack drone or a support drone. Sentinels can also accommodate their own unique stat-increasing Mods, similar to Warframe mods.

Sentinels, like Weapons and Warframes, level up with Affinity. They have health, shields, armor, a personal weapon, and energy reserves. They can be targeted separately from their Tenno master and do not go into bleedout; they will immediately explode and automatically revive after 60s, modified by Mods such as Mod TT 20px Regen (Or Mod TT 20px Reawaken for Djinn) and Mod TT 20px Sacrifice. Enemies tend to target a Warframe first, but may target the sentinel if it acquires threat.

Each Sentinel comes with a unique weapon, taking up a total of two Robotic slots, which are independent from Warframe and Weapon slots and shared with Robotic weapons and MOA Companions. An additional pair of slots costs Platinum64 12 to purchase. All Sentinels will come with two mods specific to their type. Sentinels have four Penjaga Pol Polarity slots, an Orokin Reactor upgrade slot, and can be Polarized with a Forma.

Currently, all Sentinels may be acquired and equipped regardless of Mastery Rank.

Sentinels can equip other Sentinels' weapons (with the exception of Helios Helios's Deconstructor Deconstructor, which can only be equipped on Helios, though Helios can freely use other weapons) provided additional weapons are available. However, the only way to get another sentinel's weapon is to craft that particular sentinel to retrieve their specific weapon. All sentinels do not attack by default unless they possess an attacking precept such as Mod TT 20px Assault Mode. Players may also opt to unequip a Robotic weapon altogether if attacking enemies will be detrimental to the given mission. Though Robotic weapons can be sold independent of their parent Sentinel, the player cannot sell their last Robotic weapon.

Sentinels also share Robotic weapons with MOAs. Even though most Robotic weapons are acquired by building a Sentinel, Legs in Fortuna sells blueprints for Robotic weapons that are not attached to a Sentinel and can be used by both Sentinels and MOA Companions. The Hound weapons Akaten Akaten, Batoten Batoten, and Lacerten Lacerten can not be used by Sentinels.

A weapon mod can be used in both a player's active weapon and their sentinel's active weapon. For example the Sweeper Sweeper can use the same copy of Mod TT 20px Point Blank equipped on a Hek Hek.

Robotic weapons do not possess an Exilus slot and cannot equip Arcane Enhancements.

Aside from the pool of mods shared between all Sentinels, there are at least two exclusive Sentinel Mods for each Sentinel (including any available variants) that modifies its behavior during combat. Typically, these are obtained as soon as the player claims them from the Foundry, though some of them can drop from enemies, and others can be found from other sources.

As with all Companions, Precept mods will have different priorities in which they are used, based on which slot they equipped in; the top left mod slot has the highest priority and will be used most often, while the bottom right mod slot has the lowest priority and will be used least often. Managing these mods is key to get the most out of your Sentinel.

Hotfix 36.0.1 (2024-06-19)

Update 36.0 (2024-06-18)

Update 35.5 (2024-03-27)

Hotfix 35.0.10 (2024-01-18)

Hotfix 34.0.8 (2023-11-09)

Hotfix 34.0.6 (2023-10-30)

Hotfix 34.0.4 (2023-10-24)

Hotfix 34.0.1 (2023-10-18)

Update 34.0 (2023-10-18)

COMPANION REWORK (PHASE 1)

This section covers the following topics (in order):

Your furry, robotic, fleshy, and everything in between pals have received a rework! Read on to learn how the way you use, Mod, and interact with your Companions has changed in this first phase of the Companion system overhaul.

Our high-level objectives for this Companion rework are:

1. Make Companions more viable in high-level gameplay by making them immortal.
Companions can no longer die! This avoids frustrating scenarios where you are relying on your Companion to provide some feature or bonus only to have them get removed from play. The base stats of Companions have also been increased significantly to help them in difficult missions.

2. Introduce more interactive Mods that offer ways to play alongside your Companion instead of it being mostly autonomous like a specter.

3. Changes to many Companion Mods, mostly to support the first two goals of removing death states and improving basic survivability.
Some Mods were inconsistent in their naming or stats, and we have improved this. We have rebalanced some Mods that players felt were not good enough, or ones that we've observed are SO good that they are considered "essential."

COMPANION IMMORTALITY

We've all seen the memes with people giving their Companions funny names, only to see the message over and over every few minutes: "Your Companion is down!" Dying Kavats and Kubrows have been demanding attention on your HUD, and spontaneously combusting Sentinels have been robbing you of your Vacuum and Animal Instinct for years.

All that changes with this update. Going forward, Companions will still have Health and Shield values, and they can be knocked out, but they will not die if you fail to revive them. When they reach zero Health, Companions will instead become Incapacitated for a base duration of 60 seconds. All Companions will automatically revive at the end of their Incapacitate period, and there is no limit to the number of times this can happen. Upon reviving all Companions have 5 seconds of invulnerability to get back on their feet safely!

Here are the specifics to how each Companion behaves while Incapacitation:

Several Mods have been modified or introduced that also change when or how your Companion deals with Incapacitation - see the “Companion Mod Changes & Additions” section below for specifics.

COMPANION STAT CHANGES

Two broad changes have been made with regard to your Companion's base stats to increase their staying power:

1. Health, Shields and Armor have been refactored across the board.
This simple numeric buff was made with the goal of increasing Companion survivability. This also means that the choice of whether to use, for example, Enhanced Vitality or Linked Vitality, will depend on your Warframe choice instead of the Linked Mod always being strictly superior.

2. Non-Sentinel Companions now gain their full Health and Shield values immediately when you acquire them.
Historically Health and Shield values would increase as your Companion ranked up, which you could see as "Rank Bonuses" in the Upgrades screen. We've removed this behavior and simply given Companions what would end up being their Rank 30 values at Rank 0. This should let you immediately take your Companions on more difficult missions after earning them!

Revised Sentinel Stats:

CONSISTENCY IN COMPANION HEALING

Previously, the Mod “Link Health” could cause your Companions to gain some of the healing that your Warframe did. This invisible feature was not indicated by the card, and it was never explained what forms of healing worked or why. Additionally, Companions were using some of the same mechanics that things like mission objectives did, which limited the effects of some healing or defensive powers. We've decided to remove both of these obscure mechanics and restrictions.

Companions will no longer gain Health when your Warframe does if using certain Health-absorbing powers together with the Mod “Link Vitality” (formerly Link Health). The restrictions of the following abilities and features, as they apply to granting Health, Shields, or Damage Resistance to Companions have been removed:

COMPANION MOD CHANGES & ADDITIONS

Changes To Existing Mods
Several Mods have been modified to interact with how your Companion deals with Incapacitation.

Stats below are shown at Max Rank.

Sentinel Survivability Mod Changes:

Other Companion Mod Changes:

New Companion Mods

Referring back to the introduction, one of our goals with the Companion rework is to add opportunities for the player to work together with the Companion. Instead of a Mod that only affects your Companion, we looked for ways that you and your Companion could amplify each other.

The following new Mods aim to do just that!

These Mods are available to acquire at the Conservation vendors in Cetus (Master Teasonai), Fortuna (The Business), and the Necralisk (Son).

*Stats below are shown at Max Rank.

Available In Master Teasonai’s Offerings (Cetus):

Tandem Bond
Companion melee hits increase your combo by 6. Heavy Attacks increase Companion melee damage by 30% of melee damage multiplied by your combo multiplier for 30s.

Covert Bond
Finisher and Mercy Kills grant your Companion 10s of stealth that attacks will not disrupt, up to 60s.

Mystic Bond
After your Companion uses Abilities with cooldowns 5 times, you may cast a Warframe Ability without expending Energy.

Restorative Bond
Health Orbs restore 60 more Health and reduce Companion Recovery by 3s.

Manifold Bond (Robotic)*

Companion Precept Mods apply Status Effects from Companion weapons. Killing enemies with 3 or more unique Status Effects reduces Companion Ability cooldowns by 3s.

*Work is still ongoing for this mod, we are aware of some Robotic Companion Precepts which do not trigger the bonus Status Effects.

Available In The Business’ Offerings (Fortuna):

Aerial Bond
Airborne kills decrease Companion Recovery timer by 3s and 9s for headshot kills. Companion creates a field of Cold that increases up to 35% Status chance and 10m radius while Warframe is airborne, lasting for 3s after returning to the ground.

Astral Bond
Damage dealt by Operator or Drifter grants 120% Void damage to your Companion’s attacks for 10s. Companion Void damage adds +30% Amp and Energy Efficiency to Operator or Drifter for 5s.

Momentous Bond
Killing Eximus enemies grants 120% bonus of a random Elemental Damage to your Companion for 30s and reduces Companion Recovery by 12s.

Reinforced Bond
If the Companion exceeds 1200 maximum shields or Overshields, then your fire rate is increased by 60%. Reloading restores 150 Overshields to your Companion.

Tenacious Bond
Headshot kills reduce Companion Recovery timer by 3s. If the Companion’s Critical Chance is over 50% then you gain +0.6x Final Critical Damage Multiplier.

Available In Son’s Offerings (Necralisk):

Duplex Bond
Companion will clone itself each time you expend 100 Energy, up to 3 Clones. Clones live for 30s and their kills have a 50% chance of dropping Energy Orbs.

Seismic Bond
While a channeled Ability is active, Companion melee attacks create a 4m shockwave for 30% of their melee damage. Damage dealt by your Companion increases your Ability Efficiency by 3% for 12 seconds. Max 10 stacks.

Vicious Bond
Companion melee attacks strip 15% of enemy armor. Melee attacks on enemies recently damaged by Abilities apply the effect in a 9m radius.

Contagious Bond
When your Companion kills an enemy afflicted with a Status Effect, 50% of the Status Effect spreads to other enemies within 9m.

FURTHER COMPANION QUALITY-OF-LIFE CHANGES

A few further changes that are worth mentioning:

Update 32.0 (2022-09-07)

Hotfix 31.5.10 (2022-05-17)

Hotfix 31.5.9 (2022-05-12)

Hotfix 30.5.5 (2021-07-29)

Update 30.2 (2021-05-12)

Hotfix 29.1.2 (2020-09-22)

Hotfix 28.0.1 (2020-06-11)

Hotfix 27.3.14 (2020-04-15)

Update 27.3 (2020-03-24)

Update 27.2 (2020-03-05)

Sharing Sentinel Mods: Shared Usage Allowed:

Sentinel Weapons and Warframe weapons cannot share Mods, which is to say: if you have 1 Maxed Serration Mod, your Sentinel’s Weapon cannot use it if you have a Primary Weapon with it equipped. You either switch your Sentinel Weapon to a different class (Shotgun, Melee), or acquire and max a duplicate Mod.

We are removing this condition and now your Mods can be simultaneously equipped.

Why: Over time, the amount of systems to put your time into have increased. The appeal of grinding out a Duplicate Mod for Sentinels just isn’t a proposition we want players to be faced with in the context of everything else the game has to offer!

Hotfix 25.7.4 (2019-09-05)

Hotfix 25.7.2 (2019-08-30)

Hotfix 25.7.1 (2019-08-30)

Update 25.7 (2019-08-29)

Update 11.5 (2013-12-19)

Update 11.0 (2013-11-20)

Update 10.0 (2013-09-13)

Update 7.5 (2013-03-28)

Update 7.4 (2013-03-27)

Update 7.2 (2013-03-22)

Update 7.0 (2013-03-18)

Introduced