Once Human Deviants Tier List: Best Picks for Combat and Base

The only Deviant tier list you actually need

Deviants in Once Human are far more than cosmetic companions. They fight alongside you, automate your base, speed up crafting, and gather resources while you sleep. With over 20 distinct Deviants split across Combat, Territory, and Crafting categories, knowing which ones to chase first saves you hours of wasted effort. After running through multiple scenarios and testing these companions across PvE and PvP content, here is every Deviant ranked from essential to skip.

Butterfly's Emissary in action

What are the three types of Deviants in Once Human?

Before getting into rankings, understanding the categories matters. According to both Skycoach and Game8's coverage, Deviants fall into three distinct types:

• Combat Deviants can receive direct orders and assist during fights, dealing damage or healing.
• Territory Deviants work inside your Isolated Securement Unit, handling farming, mining, logging, cooking, and base defense passively.
• Crafting (Gadget) Deviants produce specific items or consumables, from repair kits to teleportation tools.

Deviant level also matters. A higher-level version of any Deviant performs its role more effectively than its lower-level equivalent, so upgrading the ones you rely on is worth the investment.

Once Human Deviant tier list overview

This ranking is based on data from Skycoach's tier list and Game8's best Deviants guide, cross-referenced against the Deviation: Survive, Capture, Preserve update notes from Starry Studio. Rankings reflect the current state of the game as of early 2026.

Best S tier Deviants explained

Butterfly's Emissary

Type: Combat | Acquisition: Given automatically during the tutorial

The easiest S tier Deviant to obtain is also genuinely one of the best. Butterfly's Emissary marks enemy weak spots during auto-attacks, amplifying the damage those spots receive. For weakspot-focused builds, this translates to a significant damage increase with zero extra effort. According to Game8, it can also be farmed later from Securement Silo Alpha and GAIA Research Center Ruins if you want a higher-level copy.

Mr. Wish

Type: Combat | Acquisition: Drops from Securement Silo Sigma (PvP servers)

Described by Skycoach as the best combat Deviant in Phase One, Mr. Wish locks onto nearby enemies and unleashes a rapid-fire barrage that applies the Bull's Eye effect. After the initial burst, it switches to continuous ranged attacks, maintaining mark uptime and boosting your overall Weapon DMG. If you are running a Bull's Eye build, this is not optional. Getting it requires persistence on PvP servers, but the payoff is real.

Chefosaurus Rex

Type: Territory | Acquisition: Securement Silo Phi (PvE only) or Lowe's "There's a Dragon Here" side quest

The best base-management Deviant in the game. Chefosaurus Rex improves the effects of all food cooked while it is active, providing buffs for longevity, sanity gain, and health gain. Sustaining your character through the mid and late game becomes noticeably easier with this one running in your territory. Game8 lists it as a top early game pick for PvE players.

H37

Type: Territory | Acquisition: Complete H37's side quest

A small round robot that seeks out rare, higher-rank materials that would otherwise require active farming. Its passive ability to surface difficult-to-find resources makes it one of the strongest quality-of-life Deviants for base development, according to Skycoach's analysis.

Frog the Leaper

Type: Crafting | Acquisition: Found near lily pads with bright blue coloring in ponds

Frog the Leaper provides two distinct benefits: free fishing bait and the ability to craft Spring Legs, which grant increased jump height at a small stamina cost. Game8 notes this is particularly useful for reaching previously inaccessible areas and solving environmental puzzles. It is one of the few Crafting Deviants with meaningful exploration value.

Best combat Deviants: full breakdown

Beyond the S tier, several Combat Deviants are worth pursuing depending on your build.

Festering Gel (A tier) is the most accessible healing Deviant in the game. Activating it restores your health mid-fight, giving you breathing room in tough encounters. It drops from the Ravenous Hunter boss inside the Monolith of Greed in Dayton Wetlands (coordinates 6005, -4819), according to Game8. For early game survivability, nothing beats it.

Lonewolf's Whisper leaps into combat, draws aggro, and boosts your weapon damage. Every enemy it kills spawns a wolf clone, making it increasingly effective in dense fights. It drops from the Shadow Hound boss.

Zeno-Purifier is a melee-oriented Combat Deviant that teleports into battle with a katana and deals damage scaling with its skill rating. As a season reward for defeating 200 enemies with melee attacks, it rewards aggressive playstyles.

Whalepup transforms the fight by creating water currents that immobilize enemies while boosting damage for both Metas and the Deviant itself. Clear Securement Silo Theta to unlock it.

Invincible Sun continuously applies Burn to all nearby enemies, making it the go-to pick for Blaze DMG builds. It is the reward for clearing Securement Silo Delta in the Way of Winter scenario.

Snowsprite mirrors that role for Frost Vortex builds, generating crystals that deal Frost DMG and increase enemy Frost DMG vulnerability. It is obtained through the Deviation: Snowsprite quest in Way of Winter.

Best territory Deviants: who runs your base?

Your territory runs on the Deviants you assign to it. These are the ones worth prioritizing.

The Digby Boy is the single most valuable territory pick for resource efficiency. Placed in an Isolated Securement Unit, it passively gathers ore without any input from you. Game8 calls it a top-tier ore farmer and lists it as one of the best early game Deviants. Unlock it by completing Lowe's Deviation Expert side quest.

Logging Beaver does the same job for wood. Capture it in front of Margerie's Store at Broken Delta (coordinates 5698, -6667). If your build requires heavy crafting or construction, this Deviant pays for itself within the first session.

Electric Eel acts as a living battery, boosting your generator's power limit so all your crafting facilities stay online simultaneously. Catch it by fishing in Meyer's Market (coordinates 5728, -6664).

Paper Doll automatically collects materials and, at level 5, can gather high-tier resources regardless of which phase the scenario is in. Capture it in residential areas.

Director Fox, added in the Deviation: Survive, Capture, Preserve update, boosts tameness for territory animals, accelerates youngling growth, and gives animals a chance to produce extra offspring. It drops from the final boss of Securement Silo PSI.

Lethal Rabbit hunts animals for you and supplies a steady stream of meat and hides. Hunt and skin rabbits southwest of Sunbury (coordinates 4512, -7414) to obtain it.

Digby Boy passive ore farm

Best crafting Deviants: what do they actually make?

Artisan's Touch produces Universal Toolkits used to craft the All Purpose Hand, which instantly repairs your lowest durability equipment. It drops from the Scorcher enemy, making it farmable with some patience.

Harveseed generates Heart Vines, the key material for crafting Living Armor. That armor automatically restores your health when it drops below 20%, making it a lifesaving piece of gear for solo players. Harveseed drops from the Treant boss.

Space Turner crafts Space Twisters that teleport your entire party to your location instantly. For group play and quick repositioning, this is one of the most underrated Deviants in the game. It can drop from door puzzles, including the Dayton Hospital escape puzzle.

Atomic Snail lets you craft potions that grant a mid-air dash, adding a burst of mobility that has real combat and traversal applications. Open Stardust's Advent III Crates to obtain it.

What are the best early game Deviants?

If you are just starting out, focus on these picks before anything else, according to Game8's early game recommendations:

• Butterfly's Emissary (free from tutorial, marks weakspots immediately)
• Festering Gel (heals in combat, drops from Ravenous Hunter)
• The Digby Boy (passive ore farming, from Lowe's Deviation Expert quest)
• Logging Beaver (passive wood farming, capturable near Broken Delta)
• Chefosaurus Rex (food buff amplifier, PvE exclusive via "There's a Dragon Here" quest)
• Electric Eel (generator power boost, fishable at Meyer's Market)

These six cover combat survivability, resource automation, and base power in one focused list. Getting all of them before Phase 2 puts you well ahead of players who chase flashier but harder-to-obtain options.

How does the Deviation: Survive, Capture, Preserve scenario change things?

The Deviation: Survive, Capture, Preserve scenario, which launched on October 29, 2025 according to Starry Studio's official patch notes, operates completely separately from other scenarios. Your stats from other scenarios do not carry over.

The key mechanical change is the Symbiosis System. Deviant ability strength now scales directly with your Symbiosis Level, which was expanded from a maximum of 5 to a maximum of 10 in the full launch version. Reaching higher Symbiosis Levels also unlocks Tech Memetics that were previously gated behind scenario progression.

The update also changed how Deviation Fusion works. Load values were removed from fusion items, detailed Skill Mutagen descriptions were added, and the server-wide limit on obtaining Chaos Deviations was removed. Chaos Trials unlock at Symbiosis Level 9, letting you challenge Chaos Deviations in each arena for Chaos Medals redeemable at Arena Shops.

In this scenario, Deviant targeting was also refined. Deviants now prioritize targets in this order: taunting enemies, then marked enemies, then your active target, then enemies that damage you, then enemies by aggro. Understanding this priority chain helps you build lineups that control the battlefield more reliably.

For more guides across all genres and games, browse more guides on Games.GG.