Abiotic Factor is a survival crafting game set inside a massive underground research facility where a containment breach has released alien creatures. You play as a scientist trapped in the labs, crafting weapons and tools from office supplies and lab equipment to survive. The Half-Life meets Subnautica premise is executed with humor — your first weapons are staplers and fire extinguishers, and your base is built from office furniture barricades. Co-op for up to 6 players adds chaos to the already absurd premise. The game entered Early Access in 2024 and quickly gained popularity for its unique setting and creative crafting system.
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 |
|---|---|---|---|
| Scientist | S | Stay in the base researching and crafting while others gather materials and fight aliens. | Lab Coat, Science Stations, Research Materials |
| Engineer | A | Fortify the base with turrets and traps, maintain power systems, build infrastructure for the team. | Toolbox, Building Materials, Turret Components, Tesla Coils |
| Security | A | Lead the team into dangerous areas, engage aliens directly, protect Scientist and Engineer players. | Best available weapon, Body Armor (crafted), First Aid supplies |
| IT Specialist | B | Hack terminals to open locked areas, access security cameras for scouting, reactivate facility systems. | Laptop, Hacking Tools, Electronic Components |
| Custodian | B | Keep the base clean and stocked, cook meals for stat buffs, manage inventory and supplies. | Cleaning Supplies, Food Storage, Water Purifier |
S-Tier: Scientist
Focuses on research and crafting, unlocking the best recipes and equipment for the team. The Scientist prioritizes building and upgrading science stations before combat gear. In co-op, the Scientist is the force multiplier who makes everyone else more effective.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Staple Gun | Your first ranged weapon, crafted from an office stapler and rubber bands. |
| Core Gear | Lab Coat, Science Stations, Research Materials | Maximizes build potential |
| Stat Priority | Intelligence, Research Speed, Crafting Efficiency | Optimal scaling |
| Key Mechanic | office survival | The facility provides a unique survival context — instead of trees and rocks, you scavenge desks, computers, vending machines, and lab equipment. |
How to Play Scientist
Stay in the base researching and crafting while others gather materials and fight aliens.
Focuses on research and crafting, unlocking the best recipes and equipment for the team. The Scientist prioritizes building and upgrading science stations before combat gear. In co-op, the Scientist is the force multiplier who makes everyone else more effective.
What makes this build work: The synergy between Staple Gun and office survival creates a gameplay loop that outperforms other options. Core gear like Lab Coat, Science Stations, Research Materials amplifies this further.
Pros:
- Highest overall performance
- Clear stat priority (Intelligence, Research Speed, Crafting Efficiency) makes gearing straightforward
- Works in all content types
Cons:
- Popular pick, resources may be contested
- Needs specific gear to reach full potential
A-Tier: Engineer
Specializes in base construction and turret placement. The Engineer turns facility corridors into kill zones with electric fences, turret emplacements, and automated doors. Their builds passively defend the team while they work.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Fire Extinguisher | Repurposed as a short-range spray weapon that slows and damages aliens. |
| Core Gear | Toolbox, Building Materials, Turret Components, Tesla Coils | Maximizes build potential |
| Stat Priority | Construction Speed, Electrical Knowledge, Resource Efficiency | Optimal scaling |
| Key Mechanic | science crafting | Crafting uses a research-based system where you study items at science stations to unlock recipes. |
How to Play Engineer
Fortify the base with turrets and traps, maintain power systems, build infrastructure for the team.
Specializes in base construction and turret placement. The Engineer turns facility corridors into kill zones with electric fences, turret emplacements, and automated doors. Their builds passively defend the team while they work.
What makes this build work: The synergy between Fire Extinguisher and science crafting creates a gameplay loop that offers reliable performance. Core gear like Toolbox, Building Materials, Turret Components, Tesla Coils amplifies this further.
Pros:
- Most versatile option
- Clear stat priority (Construction Speed, Electrical Knowledge, Resource Efficiency) makes gearing straightforward
- Works in all content types
Cons:
- Lower peak damage than S-tier
- Needs specific gear to reach full potential
A-Tier: Security
The combat specialist who takes point during exploration and handles alien encounters. Security builds prioritize weapon damage and durability. The team's vanguard for pushing into new facility sections.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Makeshift Blade | A sharpened piece of lab equipment turned into a melee weapon. |
| Core Gear | Best available weapon, Body Armor (crafted), First Aid supplies | Maximizes build potential |
| Stat Priority | Combat Damage, Health, Armor Rating | Optimal scaling |
| Key Mechanic | alien encounters | Various alien species escaped from containment, each with unique behaviors. |
How to Play Security
Lead the team into dangerous areas, engage aliens directly, protect Scientist and Engineer players.
The combat specialist who takes point during exploration and handles alien encounters. Security builds prioritize weapon damage and durability. The team's vanguard for pushing into new facility sections.
What makes this build work: The synergy between Makeshift Blade and alien encounters creates a gameplay loop that offers reliable performance. Core gear like Best available weapon, Body Armor (crafted), First Aid supplies amplifies this further.
Pros:
- Best survivability
- Clear stat priority (Combat Damage, Health, Armor Rating) makes gearing straightforward
- Works in all content types
Cons:
- Slower clear speeds
- Needs specific gear to reach full potential
B-Tier: IT Specialist
Focuses on hacking facility systems — unlocking electronic doors, accessing security cameras, and reactivating powered systems. IT Specialists open paths that other builds can't access, including shortcuts and sealed lab sections.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Tesla Coil | An electrical trap placed on the ground that zaps aliens walking over it. |
| Core Gear | Laptop, Hacking Tools, Electronic Components | Maximizes build potential |
| Stat Priority | Hacking Skill, Electronics Knowledge, Stealth | Optimal scaling |
| Key Mechanic | base building | Barricade sections of the facility using office furniture, reinforced doors, and makeshift walls. |
How to Play IT Specialist
Hack terminals to open locked areas, access security cameras for scouting, reactivate facility systems.
Focuses on hacking facility systems — unlocking electronic doors, accessing security cameras, and reactivating powered systems. IT Specialists open paths that other builds can't access, including shortcuts and sealed lab sections.
What makes this build work: The synergy between Tesla Coil and base building creates a gameplay loop that provides a unique approach. Core gear like Laptop, Hacking Tools, Electronic Components amplifies this further.
Pros:
- Strong in group/team content
- Clear stat priority (Hacking Skill, Electronics Knowledge, Stealth) makes gearing straightforward
- Excels in its niche
Cons:
- Weaker solo performance
- Requires deep game knowledge
B-Tier: Custodian
The support role maintaining base cleanliness (which affects morale), managing food/water supplies, and handling logistics. Less glamorous but in longer sessions, the Custodian's resource management prevents starvation and morale collapse.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Chemical Sprayer | Late-game weapon spraying corrosive chemicals that dissolve alien armor. |
| Core Gear | Cleaning Supplies, Food Storage, Water Purifier | Maximizes build potential |
| Stat Priority | Resource Management, Cooking Skill, Morale Maintenance | Optimal scaling |
| Key Mechanic | co-op research | In multiplayer, research progress is shared but crafting stations can only be used by one player at a time. |
How to Play Custodian
Keep the base clean and stocked, cook meals for stat buffs, manage inventory and supplies.
The support role maintaining base cleanliness (which affects morale), managing food/water supplies, and handling logistics. Less glamorous but in longer sessions, the Custodian's resource management prevents starvation and morale collapse.
What makes this build work: The synergy between Chemical Sprayer and co-op research creates a gameplay loop that provides a unique approach. Core gear like Cleaning Supplies, Food Storage, Water Purifier amplifies this further.
Pros:
- Unique, rewarding playstyle
- Clear stat priority (Resource Management, Cooking Skill, Morale Maintenance) makes gearing straightforward
- Excels in its niche
Cons:
- High skill floor, punishing when misplayed
- Requires deep game knowledge
Build Progression Path
- Start with Engineer — the most forgiving option for learning the game
- Transition to Scientist once you understand core mechanics and have access to Staple Gun
- Keep a Security setup for content that keeps killing you
- Try Custodian for a fresh experience once you've mastered the basics
Gearing Tips
- Invest in your primary equipment first — it gives the biggest power spike
- Build a science station before anything else. Research unlocks exponentially better equipment — 30 minutes of research is worth more than an hour of scavenging.
- Vending machines are your best early food source. They respawn on a timer. Mark vending machine locations on your map and create a collection route.
- 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.
