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.
Choosing the right build shapes your entire experience. This guide breaks down every option — what they're good at, what they struggle with, and which one matches your playstyle. For optimized builds with full gear sets, see our builds guide.
Quick Comparison
| Build | Tier | Playstyle | Best Equipment | Beginner Friendly? |
|---|---|---|---|---|
| Scientist | S | Stay in the base researching and crafting while others gather materials and fight aliens. | Staple Gun | Moderate |
| Engineer | A | Fortify the base with turrets and traps, maintain power systems, build infrastructure for the team. | Fire Extinguisher | Yes |
| Security | A | Lead the team into dangerous areas, engage aliens directly, protect Scientist and Engineer players. | Makeshift Blade | Yes |
| IT Specialist | B | Hack terminals to open locked areas, access security cameras for scouting, reactivate facility systems. | Tesla Coil | No |
| Custodian | B | Keep the base clean and stocked, cook meals for stat buffs, manage inventory and supplies. | Chemical Sprayer | No |
New player? Start with Engineer — see our beginner's guide for why.
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.
| Attribute | Detail |
|---|---|
| Tier | S |
| Playstyle | Stay in the base researching and crafting while others gather materials and fight aliens. |
| Best Equipment | Staple Gun |
| Stat Priority | Intelligence, Research Speed, Crafting Efficiency |
| Core Gear | Lab Coat, Science Stations, Research Materials |
| Key Mechanic | office survival |
Strengths
- Highest overall performance across all content types
- Stay in the base researching and crafting while others gather materials and fight aliens.
- Pairs well with Staple Gun
Weaknesses
- Popular choice, competition for resources
- Needs specific gear to reach full potential
Recommended Progression
- Start in Office Floor to learn Scientist-specific mechanics
- Focus on office survival — it's this build's primary system
- Prioritize Staple Gun as your first major upgrade
- See our full Scientist build guide for the optimal gear progression
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.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Fortify the base with turrets and traps, maintain power systems, build infrastructure for the team. |
| Best Equipment | Fire Extinguisher |
| Stat Priority | Construction Speed, Electrical Knowledge, Resource Efficiency |
| Core Gear | Toolbox, Building Materials, Turret Components, Tesla Coils |
| Key Mechanic | science crafting |
Strengths
- Most versatile — adapts to any situation
- Fortify the base with turrets and traps, maintain power systems, build infrastructure for the team.
- Pairs well with Fire Extinguisher
Weaknesses
- Lower peak damage than S-tier options
- Needs specific gear to reach full potential
Recommended Progression
- Start in Office Floor to learn Engineer-specific mechanics
- Focus on science crafting — it's this build's primary system
- Prioritize Fire Extinguisher as your first major upgrade
- See our full Engineer build guide for the optimal gear progression
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.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Lead the team into dangerous areas, engage aliens directly, protect Scientist and Engineer players. |
| Best Equipment | Makeshift Blade |
| Stat Priority | Combat Damage, Health, Armor Rating |
| Core Gear | Best available weapon, Body Armor (crafted), First Aid supplies |
| Key Mechanic | alien encounters |
Strengths
- Best survivability for learning hard content
- Lead the team into dangerous areas, engage aliens directly, protect Scientist and Engineer players.
- Pairs well with Makeshift Blade
Weaknesses
- Slower progression speed
- Needs specific gear to reach full potential
Recommended Progression
- Start in Office Floor to learn Security-specific mechanics
- Focus on alien encounters — it's this build's primary system
- Prioritize Makeshift Blade as your first major upgrade
- See our full Security build guide for the optimal gear progression
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.
| Attribute | Detail |
|---|---|
| Tier | B |
| Playstyle | Hack terminals to open locked areas, access security cameras for scouting, reactivate facility systems. |
| Best Equipment | Tesla Coil |
| Stat Priority | Hacking Skill, Electronics Knowledge, Stealth |
| Core Gear | Laptop, Hacking Tools, Electronic Components |
| Key Mechanic | base building |
Strengths
- Excellent in group and cooperative content
- Hack terminals to open locked areas, access security cameras for scouting, reactivate facility systems.
- Pairs well with Tesla Coil
Weaknesses
- Less effective solo
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Office Floor to learn IT Specialist-specific mechanics
- Focus on base building — it's this build's primary system
- Prioritize Tesla Coil as your first major upgrade
- See our full IT Specialist build guide for the optimal gear progression
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.
| Attribute | Detail |
|---|---|
| Tier | B |
| Playstyle | Keep the base clean and stocked, cook meals for stat buffs, manage inventory and supplies. |
| Best Equipment | Chemical Sprayer |
| Stat Priority | Resource Management, Cooking Skill, Morale Maintenance |
| Core Gear | Cleaning Supplies, Food Storage, Water Purifier |
| Key Mechanic | co-op research |
Strengths
- Highest skill ceiling with unique mechanics
- Keep the base clean and stocked, cook meals for stat buffs, manage inventory and supplies.
- Pairs well with Chemical Sprayer
Weaknesses
- Steep learning curve, punishing mistakes
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Office Floor to learn Custodian-specific mechanics
- Focus on co-op research — it's this build's primary system
- Prioritize Chemical Sprayer as your first major upgrade
- See our full Custodian build guide for the optimal gear progression
Which Build Should You Pick?
For Beginners
Engineer is the clear winner. It's forgiving, teaches core mechanics, and remains competitive into endgame. Follow our beginner's guide for the best first-session experience.
For Maximum Performance
Scientist is the top pick once you understand the game's mechanics. Pair it with Staple Gun for the strongest overall setup.
For a Challenge
Custodian offers the highest skill ceiling. It's punishing when misplayed but incredibly rewarding when mastered. Only recommended after you've completed the game with another build.
For Group Play
IT Specialist shines in cooperative content with utility and team support capabilities.
More Abiotic Factor Guides
- Abiotic Factor Abiotic Factor Overview
- Abiotic Factor Best Builds
- Abiotic Factor Tier List
- Abiotic Factor Walkthrough
- Abiotic Factor Beginner's Guide
- Abiotic Factor Tips & Tricks
- Abiotic Factor Weapons Guide
- Abiotic Factor Combat Guide
- Abiotic Factor Boss Guide
- Abiotic Factor Maps & Locations
- Abiotic Factor Crafting Guide
Similar Games
If you enjoy Abiotic Factor, check out these related guides:
- Palworld Classes Guide — survival game with similar mechanics
- Rust Classes Guide — survival game with similar mechanics
- ARK: Survival Evolved Classes Guide — survival game with similar mechanics
