Once Human is a free-to-play open-world survival game set in a post-apocalyptic world infected by an alien substance called Starchrom. You collect Deviations — mutated creatures that serve as combat companions and base utilities — while building territories, crafting gear, and fighting in both PvE and PvP content. The game operates on seasonal servers that reset periodically, with some progression carrying over through the Cradle system. With gunplay-focused combat, a distinctive art style blending sci-fi with cosmic horror, and the unique Deviation collection system, Once Human offers a fresh take on the survival genre.
Picking the right build determines how your experience plays out. These builds are ranked by overall effectiveness — factoring in damage, survivability, gear requirements, and how well they scale into endgame.
Quick Rankings
| Build | Tier | Playstyle | Core Gear |
|---|---|---|---|
| Firearm DPS | S | Engage at medium range with automatic weapons, use cover, mod weapons for maximum DPS. | Assault Rifle, SMG, Weapon mods, Damage-boosting Deviations |
| Melee Tank | B | Close distance quickly, tank damage with armor and Deviation support, deal heavy melee damage. | Melee weapon, Heavy Armor, Healing Deviations, Gap-closing tools |
| Support Build | A | Deploy healing and buff Deviations during group content, support allies, handle secondary DPS. | Healing Deviations, Buff Deviations, Support weapons, Group play focus |
| Sniper | A | Engage from maximum range, one-shot enemies with headshots, reposition between shots. | Sniper Rifle, Long-range scope, Stealth Deviations, Light Armor |
| Deviation Master | A | Deploy combat Deviations as primary damage, support with gunfire, collect rare Deviations. | Combat Deviations, Deviation enhancement items, Any weapon |
S-Tier: Firearm DPS
Focus on assault rifles and SMGs for sustained ranged damage. Firearm DPS is the most straightforward build — aim and shoot. Weapon mods improve damage, accuracy, and fire rate. The strongest general-purpose combat build.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | AK-47 | A reliable assault rifle with moderate damage, good accuracy, and common ammunition. |
| Core Gear | Assault Rifle, SMG, Weapon mods, Damage-boosting Deviations | Maximizes build potential |
| Stat Priority | Weapon damage, Accuracy, Fire rate, Critical chance | Optimal scaling |
| Key Mechanic | deviation collection | Deviations are mutated creatures you capture and deploy as combat pets, base utilities, or decorations. |
How to Play Firearm DPS
Engage at medium range with automatic weapons, use cover, mod weapons for maximum DPS.
Focus on assault rifles and SMGs for sustained ranged damage. Firearm DPS is the most straightforward build — aim and shoot. Weapon mods improve damage, accuracy, and fire rate. The strongest general-purpose combat build.
What makes this build work: The synergy between AK-47 and deviation collection creates a gameplay loop that outperforms other options. Core gear like Assault Rifle, SMG, Weapon mods, Damage-boosting Deviations amplifies this further.
Pros:
- Highest overall performance
- Clear stat priority (Weapon damage, Accuracy, Fire rate, Critical chance) makes gearing straightforward
- Works in all content types
Cons:
- Popular pick, resources may be contested
- Needs specific gear to reach full potential
B-Tier: Melee Tank
Melee combat with heavy armor for close-range fighting. Melee is risky in a gun-focused game but deals high per-hit damage. Melee Tank requires Deviations that provide healing or damage absorption to survive closing distance.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Shotgun | Devastating at close range with spread pellets. |
| Core Gear | Melee weapon, Heavy Armor, Healing Deviations, Gap-closing tools | Maximizes build potential |
| Stat Priority | HP, Melee damage, Armor, Gap-closing ability | Optimal scaling |
| Key Mechanic | territory building | Claim territory and build a base with walls, defenses, crafting stations, and Deviation deployments. |
How to Play Melee Tank
Close distance quickly, tank damage with armor and Deviation support, deal heavy melee damage.
Melee combat with heavy armor for close-range fighting. Melee is risky in a gun-focused game but deals high per-hit damage. Melee Tank requires Deviations that provide healing or damage absorption to survive closing distance.
What makes this build work: The synergy between Shotgun and territory building creates a gameplay loop that offers reliable performance. Core gear like Melee weapon, Heavy Armor, Healing Deviations, Gap-closing tools amplifies this further.
Pros:
- Most versatile option
- Clear stat priority (HP, Melee damage, Armor, Gap-closing ability) makes gearing straightforward
- Works in all content types
Cons:
- Lower peak damage than S-tier
- Needs specific gear to reach full potential
A-Tier: Support Build
Focus on Deviations that heal and buff allies. Support builds in group content provide healing, damage buffs, and crowd control through Deviation abilities. Less effective solo but invaluable in group play.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Sniper Rifle | The highest per-shot damage weapon with extreme range. |
| Core Gear | Healing Deviations, Buff Deviations, Support weapons, Group play focus | Maximizes build potential |
| Stat Priority | Deviation effectiveness, Healing power, Group utility | Optimal scaling |
| Key Mechanic | seasonal resets | Servers operate on seasonal cycles — at season end, servers reset. |
How to Play Support Build
Deploy healing and buff Deviations during group content, support allies, handle secondary DPS.
Focus on Deviations that heal and buff allies. Support builds in group content provide healing, damage buffs, and crowd control through Deviation abilities. Less effective solo but invaluable in group play.
What makes this build work: The synergy between Sniper Rifle and seasonal resets creates a gameplay loop that offers reliable performance. Core gear like Healing Deviations, Buff Deviations, Support weapons, Group play focus amplifies this further.
Pros:
- Best survivability
- Clear stat priority (Deviation effectiveness, Healing power, Group utility) makes gearing straightforward
- Works in all content types
Cons:
- Slower clear speeds
- Needs specific gear to reach full potential
A-Tier: Sniper
Long-range sniper rifle gameplay with stealth approach. Snipers deal the highest per-shot damage from safety. Effective in PvP (one-shot potential) and PvE (safe damage from distance). Requires good aim and positioning.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Pistol | A sidearm for emergency close combat when primary weapons run dry. |
| Core Gear | Sniper Rifle, Long-range scope, Stealth Deviations, Light Armor | Maximizes build potential |
| Stat Priority | Weapon damage, Headshot multiplier, Stealth, Range | Optimal scaling |
| Key Mechanic | Starchrom crafting | Starchrom-infused materials create the game's best equipment. |
How to Play Sniper
Engage from maximum range, one-shot enemies with headshots, reposition between shots.
Long-range sniper rifle gameplay with stealth approach. Snipers deal the highest per-shot damage from safety. Effective in PvP (one-shot potential) and PvE (safe damage from distance). Requires good aim and positioning.
What makes this build work: The synergy between Pistol and Starchrom crafting creates a gameplay loop that provides a unique approach. Core gear like Sniper Rifle, Long-range scope, Stealth Deviations, Light Armor amplifies this further.
Pros:
- Strong in group/team content
- Clear stat priority (Weapon damage, Headshot multiplier, Stealth, Range) makes gearing straightforward
- Excels in its niche
Cons:
- Weaker solo performance
- Requires deep game knowledge
A-Tier: Deviation Master
Focus on maximizing Deviation collection and combat effectiveness. Deviation Masters use the strongest combat Deviations as primary damage dealers while supporting with gunfire. Requires extensive Deviation hunting.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | SMG | High fire rate, low damage per bullet, excellent for sustained DPS at close-medium range. |
| Core Gear | Combat Deviations, Deviation enhancement items, Any weapon | Maximizes build potential |
| Stat Priority | Deviation damage, Deviation collection, Deviation enhancement | Optimal scaling |
| Key Mechanic | world events | Dynamic world events spawn across the map, providing the best loot and Starchrom materials. |
How to Play Deviation Master
Deploy combat Deviations as primary damage, support with gunfire, collect rare Deviations.
Focus on maximizing Deviation collection and combat effectiveness. Deviation Masters use the strongest combat Deviations as primary damage dealers while supporting with gunfire. Requires extensive Deviation hunting.
What makes this build work: The synergy between SMG and world events creates a gameplay loop that provides a unique approach. Core gear like Combat Deviations, Deviation enhancement items, Any weapon amplifies this further.
Pros:
- Unique, rewarding playstyle
- Clear stat priority (Deviation damage, Deviation collection, Deviation enhancement) makes gearing straightforward
- Excels in its niche
Cons:
- High skill floor, punishing when misplayed
- Requires deep game knowledge
Build Progression Path
- Start with Melee Tank — the most forgiving option for learning the game
- Transition to Firearm DPS once you understand core mechanics and have access to AK-47
- Keep a Support Build setup for content that keeps killing you
- Try Deviation Master for a fresh experience once you've mastered the basics
Gearing Tips
- Invest in your primary equipment first — it gives the biggest power spike
- Deviations are pets that give combat buffs — deploy combat Deviations before every fight for significant damage and survival bonuses.
- Seasonal servers reset, so transfer important progress through the Cradle system. Cradle upgrades are permanent across seasons.
- Don't spread upgrade resources across multiple builds until endgame
See our tier list for current meta rankings, or the beginner's guide if you're just getting started.
