SCP: Secret Laboratory is a free multiplayer horror game set inside a Foundation site during a full containment breach. Each round assigns your role at random: Class-D trying to escape, a Scientist waiting on rescue, a Facility Guard, or one of the anomalies hunting everybody else. Death is permanent for that round, and the facility runs on hard timers that will kill you whether or not anything else does.
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? |
|---|---|---|---|---|
| Class-D Personnel | A | Balanced | COM-15 | Yes |
| Scientist | A | Balanced | FSP-9 | Yes |
| Facility Guard | A | Balanced | Crossvec | Yes |
| Nine-Tailed Fox | A | Balanced | MTF-E11-SR | Yes |
| Chaos Insurgency | A | Balanced | Logicer | Yes |
New player? Start with Scientist. See our beginner's guide for why.
Class-D Personnel
Class-D Personnel is a strong option in SCP: Secret Laboratory.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Balanced approach |
| Best Equipment | COM-15 |
| Stat Priority | Balanced stats |
| Core Gear | Best available |
| Key Mechanic | Role assignment and respawn waves |
Strengths
- Highest overall performance across all content types
- Solid all-around choice
- Pairs well with COM-15
Weaknesses
- Popular choice, competition for resources
- Needs specific gear to reach full potential
Recommended Progression
- Start in Light Containment Zone to learn Class-D Personnel-specific mechanics
- Focus on Role assignment and respawn waves. It's this build's primary system
- Prioritize COM-15 as your first major upgrade
- See our full Class-D Personnel build guide for the optimal gear progression
Scientist
Scientist is a strong option in SCP: Secret Laboratory.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Balanced approach |
| Best Equipment | FSP-9 |
| Stat Priority | Balanced stats |
| Core Gear | Best available |
| Key Mechanic | Keycard access levels |
Strengths
- Most versatile, adapts to any situation
- Solid all-around choice
- Pairs well with FSP-9
Weaknesses
- Lower peak damage than S-tier options
- Needs specific gear to reach full potential
Recommended Progression
- Start in Light Containment Zone to learn Scientist-specific mechanics
- Focus on Keycard access levels. It's this build's primary system
- Prioritize FSP-9 as your first major upgrade
- See our full Scientist build guide for the optimal gear progression
Facility Guard
Facility Guard is a strong option in SCP: Secret Laboratory.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Balanced approach |
| Best Equipment | Crossvec |
| Stat Priority | Balanced stats |
| Core Gear | Best available |
| Key Mechanic | SCP-914 refinement |
Strengths
- Best survivability for learning hard content
- Solid all-around choice
- Pairs well with Crossvec
Weaknesses
- Slower progression speed
- Needs specific gear to reach full potential
Recommended Progression
- Start in Light Containment Zone to learn Facility Guard-specific mechanics
- Focus on SCP-914 refinement. It's this build's primary system
- Prioritize Crossvec as your first major upgrade
- See our full Facility Guard build guide for the optimal gear progression
Nine-Tailed Fox
Nine-Tailed Fox is a strong option in SCP: Secret Laboratory.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Balanced approach |
| Best Equipment | MTF-E11-SR |
| Stat Priority | Balanced stats |
| Core Gear | Best available |
| Key Mechanic | Light Containment decontamination |
Strengths
- Excellent in group and cooperative content
- Solid all-around choice
- Pairs well with MTF-E11-SR
Weaknesses
- Less effective solo
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Light Containment Zone to learn Nine-Tailed Fox-specific mechanics
- Focus on Light Containment decontamination. It's this build's primary system
- Prioritize MTF-E11-SR as your first major upgrade
- See our full Nine-Tailed Fox build guide for the optimal gear progression
Chaos Insurgency
Chaos Insurgency is a strong option in SCP: Secret Laboratory.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Balanced approach |
| Best Equipment | Logicer |
| Stat Priority | Balanced stats |
| Core Gear | Best available |
| Key Mechanic | Emergency Power Stations and the Alpha Warhead |
Strengths
- Highest skill ceiling with unique mechanics
- Solid all-around choice
- Pairs well with Logicer
Weaknesses
- Steep learning curve, punishing mistakes
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Light Containment Zone to learn Chaos Insurgency-specific mechanics
- Focus on Emergency Power Stations and the Alpha Warhead. It's this build's primary system
- Prioritize Logicer as your first major upgrade
- See our full Chaos Insurgency build guide for the optimal gear progression
Which Build Should You Pick?
For Beginners
Scientist 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
Class-D Personnel is the top pick once you understand the game's mechanics. Pair it with COM-15 for the strongest overall setup.
For a Challenge
Chaos Insurgency 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
Nine-Tailed Fox shines in cooperative content with utility and team support capabilities.
More SCP: Secret Laboratory Guides
- SCP: Secret Laboratory SCP: Secret Laboratory Overview
- SCP: Secret Laboratory Best Builds
- SCP: Secret Laboratory Tier List
- SCP: Secret Laboratory Walkthrough
- SCP: Secret Laboratory Beginner's Guide
- SCP: Secret Laboratory Tips & Tricks
- SCP: Secret Laboratory Weapons Guide
- SCP: Secret Laboratory Combat Guide
- SCP: Secret Laboratory Boss Guide
- SCP: Secret Laboratory Maps & Locations
- SCP: Secret Laboratory Crafting Guide
Similar Games
If you enjoy SCP: Secret Laboratory, check out these related guides:
- Phasmophobia Classes Guide: horror game with similar mechanics
- Lethal Company Classes Guide: horror game with similar mechanics
- Dead by Daylight Classes Guide: horror game with similar mechanics
