There are over 80 specializations in Once Human that allow you to unlock new crafting recipes, build new structures and upgrade them, as well as improve various weapons. In this guide, I’ll provide you with a tier list of the best specializations in Once Human, including their respective unlock levels.

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Best Specializations Tier List for Once Human

S-Tier Specializations

Once you reach the top-tier levels in Once Human, you can start unlocking some amazing specializations, including the ones that double resource yields, make your character invisible, transform regular resources into rare ones, improve loot crate drops, etc. Note that some of the top-tier specializations may appear at lower levels, too. But since that’s not a 100% guarantee, to make sure, I listed the level numbers that will most definitely unlock their respective specializations.

SpecializationsTypesEffectsUnlock LevelsElectric Furnace: ElectrolysisSmelterFacility Boost: Electric Furnace50Spectral CloakMachinistNew Formula: Spectral Cloak50Nalcott Easter EggStar ChefNew Formula: Nalcott Perk50Rare Crystal SetMaster CraftsmanNew Formula: Rare Crystal Set45Kitchen Set: GourmandStar ChefFacility Boost: Kitchen Set45Stardust DelicacyStar ChefImproved Formula: Stardust Delicacy45Lucky Logging SiteProspectorNew Facility: Lucky Logging Site45Gatling Cannon: Power BlastArtillery MarshalFacility Boost: Gatling Cannon40Stardust ByproductsSmelterNew Formula: Acid40Hydraulic Generator: One
with the TidesSparksmithFacility Boost: Hydraulic Generator40 Lightning Impulse RegulatorSparksmithNew Formula: Lightning Impulse Regulator40Rifle Turrent: Two Birds One StoneArtillery MarshalFacility Boost: Rifle Turret40Stardust Barrier: Hold the LineMachinistImproved Formula: Stardust Barrier40Deviation Energy GeneratorSparksmithFacility Boost: Deviation Energy Generator40High Power WarheadDemolition ExpertNew Formula: High Power Warhead40Stardust RegulatorMaster CraftsmanNew Formula: Stardust Regulator40Gold Pickaxe, Silver PickaxeProspectorNew Formula: Gold Pickaxe, Silver
Pickaxe40Stardust MineProspectorNew Facility: Stardust Mine40Gold KnifeDemolition ExpertNew Formula: Golden Dagger40Reinforced Structures: Healing DefenseTinkererFacility Boost: Reinforced Structures40Scout Drone: Invisible HunterMachinistImproved Formula: Scout Drone40Supplies Workbench: Anti-ArmorMaster CraftsmanFacility Boost: Supplies Workbench40Ultra GrenadeDemolition ExpertNew Formula: Ultra Grenade40 Image via Starry Studio

A-Tier Specializations

Before you reach the top levels, you’ll be given a chance to unlock specializations that provide various tactical advantages, including generator power increase, electric furnace usage, improved drones and machines, synthesis bench usage, and many other cool features.

SpecializationsTypesEffectsUnlock LevelsBiomass Missile: Ample MunitionArtillery MarshalImproved Formula: Biomass Missile35Precious Metal RefiningSmelterNew Formula: Gold Ingot, Silver Ingot35Biomass Generator: Sustained OutputSparksmithFacility Boost: Biomass Generator35Stardust Water PumpsHydro EngineerNew Facility: Stardust Water Pump35Synthesis Bench: Recycle &
ReuseMaster CraftsmanFacility Boost: Synthesis Bench35Claymore Mine: Warrior’s
ResolveDemolition ExpertImproved Formula: Claymore Mine30Electric Drill: Treasure HuntProspectorImproved Formula: Electric Drill30Solar DrillProspectorNew Formula: Solar Drill30Solar Generator: Photon PowerSparksmithFacility Boost: Solar Generator30Updraft Device: Gravity LiteTinkererFacility Boost: Updraft Device30Portable MG Turret: Barrage of BulletsMachinistImproved Formula: Portable MG
Turret30Explosive Throwables: Echo BlastDemolition ExpertImproved Formula: Explosive Throwable30Shotgun Turret: Volley FireArtillery MarshalFacility Boost: Shotgun Turret30

B-Tier Specializations

The following specializations are the most used in the game, although they provide only limited advantages, such as tool durability increase, effective energy linking, portable fuel usage, movement speed increase, number of generators increase, and others.

SpecializationsTypesEffectsUnlock LevelsChainsaw: Chainsaw Horror ShowProspectorImproved Formula: Chainsaw25Furnace: SinteringTinkererFacility Boost: Furnace25Iceshake: Brain FreezeStar ChefImproved Formula: Iced Treat25Improved Compound FertilizerChild of the EarthNew Formula: Improved Compound Fertilizer25Sulfur ChemistDemolition ExpertNew Formula: Sulfur25Oil ProcessingSmelterNew Formula: Stardust Source20Electric Furnace: Efficiency LoverSmelterFacility Boost: Electric Furnace20Generator: Electrical ExpertSparksmithFacility Boost: Generator20Combo ChipsetMachinistNew Formula: Combo Chipset20Adrenaline Shot: PhoenixMaster CraftsmanImproved Formula: Adrenaline Shot20 Gravitational Grip: Bonds of GuidanceArtillery MarshalFacility Boost: Gravitational Grip20Supplies Workbench: Healing BoostMaster Craftsman
Facility Boost: Supplies Workbench20Disassembly Bench: Careful
DisassemblySmelterFacility Boost: Disassembly Bench15Flamethrower Trap: Scorching BlastArtillery MarshalFacility Boost: Flamethrower Trap15Pickaxe: Forest FoeProspectorImproved Formula: Pickaxe15Portable Rainwater CollectorHydro EngineerNew Formula: Portable Rainwater Collector15Supplies Workbench: Ammo FactoryMaster CraftsmanFacility Boost: Supplies Workbench15Portable FridgeStar ChefNew Formula: Portable Fridge15Canned Goods: Mini CannerStar ChefImproved Formula: Canned Goods15Sulfur AlchemyDemolition ExpertNew Formula: Sulfur Alchemy15Chef’s KnifeStar ChefNew Formula: Chef’s Knife15 Image via Starry Studio

C-Tier Specializations

Finally, in this tier, I picked the most common specializations that all players can use to facilitate their gameplay in the early stages. Here, you start with such simple things as sleeping to cure diseases, crafting basic gear and weapons, increasing your backpack capacity, increasing the shelf life of your cooked food, and many other basic features.

SpecializationsTypesEffectsUnlock LevelsElectronics GrabberMachinistNew Formula: Electronics Grabber10Stove: Long-Term StorageStar ChefFacility Boost: Stove10Bed: A Place to Call HomeTinkererFacility Boost: Bed10Explosive SackDemolition ExpertNew Formula: Explosive Sack10Harvesting SickleChild of the EarthNew Formula: Harvesting Sickle10Machinery: Skilled MechanicianArtillery MarshalFacility Boost: Trap & Sentry Turret10Super RefinerySmelterNew Facility: Super Refinery10Furnace: Precision RefiningSmelterFacility Boost: Furnace10Pickaxe: Moonlight MiningProspectorImproved Formula: Pickaxe10Compost BinChild of the EarthNew Formula: Compost Bin10 Backpack ExpansionMaster CraftsmanNew Formula: Backpack
Expansion10Portable Diving GearHydro EngineerNew Forumula: Portable Diving Gear10Custom Storage CrateTinkererNew Facility: Deluxe Storage Crate10Stone Structures: Intense DefenseTinkererFacility Boost: Stone Structures10Portable Updraft CannonMachinistNew Formula: Portable Updraft
Cannon10Activated Carbon FilterHydro EngineerNew Formula: Activated Carbon Filter10Throwing Dagger: BullseyeDemolition ExpertImproved Formula: Throwing Dagger10Explosive On-the-GoDemolition ExpertNew Formula: Explosive On-the-Go5Electronic RecyclingMachinist
Facility Boost: Disassembly Bench5Gardening GlovesChild of the EarthNew Formula: Gardening Gloves5Roasted & Dried: Low and SlowStar Chef
Improved Formula: Roasted5Wood Structures: Tough PlantTinkererFacility Boost: Wood Structures5Custom Gear WorkbenchMaster CraftsmanNew Facility: Gear Workbench5Gravel and Log On-the-GoProspectorNew Formula: Gravel and Log On-the-Go5

That’s it for my tier list of the best specializations in Once Human. Stay tuned for more OH tips and tricks articles right here.

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