Subnautica: Below Zero is the standalone follow-up to Subnautica, set in an arctic region of planet 4546B. You play as Robin Ayou investigating her sister's death at an Alterra research station while an alien entity named Al-An shares your mind. The game adds significant land-based exploration across frozen tundra alongside the underwater gameplay, plus the Seatruck — a modular submarine where you attach different functional modules (storage, fabricator, aquarium, sleeper) to create a custom mobile base. Below Zero is smaller and more focused than the original, with a tighter story and less open exploration.
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? |
|---|---|---|---|---|
| Deep Explorer | S | Push deeper with each expedition, scan everything new, and use the Prawn Suit for the deepest biomes where the Seatruck can't reach. | Survival Knife | Moderate |
| Base Builder | A | Scout beautiful locations, build aesthetically impressive bases, and create a network of outposts connected by Seatruck travel. | Seatruck Perimeter Defense | Yes |
| Speedrunner | B | Follow the optimal route through story triggers, skip optional content, and collect only essential resources. | Prawn Suit | No |
| Completionist | A | Systematically explore each biome, scan every creature and plant, collect every log, and build every craftable item. | Spy Pengling | Yes |
| Lore Hunter | A | Follow both the Robin investigation and Al-An body-building questlines, visiting every marked and unmarked location for story fragments. | Scanner | Yes |
New player? Start with Base Builder — see our beginner's guide for why.
Deep Explorer
Focus on reaching maximum depth with upgraded Seatruck (depth modules) and Prawn Suit. The deepest biomes contain the most valuable story content and resources. Depth Module MK3 reaches 900m+ on the Seatruck and 1300m on the Prawn Suit.
| Attribute | Detail |
|---|---|
| Tier | S |
| Playstyle | Push deeper with each expedition, scan everything new, and use the Prawn Suit for the deepest biomes where the Seatruck can't reach. |
| Best Equipment | Survival Knife |
| Stat Priority | Depth rating, oxygen capacity, vehicle power |
| Core Gear | Seatruck with Depth Module MK3, Prawn Suit with Drill Arm, Rebreather |
| Key Mechanic | Seatruck modules |
Strengths
- Highest overall performance across all content types
- Push deeper with each expedition, scan everything new, and use the Prawn Suit for the deepest biomes where the Seatruck can't reach.
- Pairs well with Survival Knife
Weaknesses
- Popular choice, competition for resources
- Needs specific gear to reach full potential
Recommended Progression
- Start in Twisty Bridges to learn Deep Explorer-specific mechanics
- Focus on Seatruck modules — it's this build's primary system
- Prioritize Survival Knife as your first major upgrade
- See our full Deep Explorer build guide for the optimal gear progression
Base Builder
Build elaborate underwater and surface bases with full amenities. Below Zero's building system adds glass corridors, observatories, and land-based modules. Thermal plant placement near heat vents provides unlimited power. The Large Room module enables expansive interior designs.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Scout beautiful locations, build aesthetically impressive bases, and create a network of outposts connected by Seatruck travel. |
| Best Equipment | Seatruck Perimeter Defense |
| Stat Priority | Hull integrity, power generation, heating |
| Core Gear | Habitat Builder, Thermal Plant, Large Room, Multipurpose Room, Nuclear Reactor |
| Key Mechanic | cold resistance |
Strengths
- Most versatile — adapts to any situation
- Scout beautiful locations, build aesthetically impressive bases, and create a network of outposts connected by Seatruck travel.
- Pairs well with Seatruck Perimeter Defense
Weaknesses
- Lower peak damage than S-tier options
- Needs specific gear to reach full potential
Recommended Progression
- Start in Twisty Bridges to learn Base Builder-specific mechanics
- Focus on cold resistance — it's this build's primary system
- Prioritize Seatruck Perimeter Defense as your first major upgrade
- See our full Base Builder build guide for the optimal gear progression
Speedrunner
Below Zero can be completed in under 2 hours by beelining to key locations. The Seaglide carries you through early game, and memorized blueprint locations skip exploration. The Snowfox hoverbike speeds up land sections. Story-critical items have fixed locations.
| Attribute | Detail |
|---|---|
| Tier | B |
| Playstyle | Follow the optimal route through story triggers, skip optional content, and collect only essential resources. |
| Best Equipment | Prawn Suit |
| Stat Priority | Speed, route memorization, oxygen capacity |
| Core Gear | Seaglide, Snowfox, Rebreather, minimal base building |
| Key Mechanic | alien research |
Strengths
- Best survivability for learning hard content
- Follow the optimal route through story triggers, skip optional content, and collect only essential resources.
- Pairs well with Prawn Suit
Weaknesses
- Slower progression speed
- Needs specific gear to reach full potential
Recommended Progression
- Start in Twisty Bridges to learn Speedrunner-specific mechanics
- Focus on alien research — it's this build's primary system
- Prioritize Prawn Suit as your first major upgrade
- See our full Speedrunner build guide for the optimal gear progression
Completionist
Scan every creature, find every PDA log, explore every cave, and build every item. Below Zero has a smaller world than the original, making 100% completion more feasible. The datapad trail tells a complete story when all logs are found.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Systematically explore each biome, scan every creature and plant, collect every log, and build every craftable item. |
| Best Equipment | Spy Pengling |
| Stat Priority | Exploration coverage, creature scanning, PDA log collection |
| Core Gear | Scanner, full vehicle suite, comprehensive base |
| Key Mechanic | base building |
Strengths
- Excellent in group and cooperative content
- Systematically explore each biome, scan every creature and plant, collect every log, and build every craftable item.
- Pairs well with Spy Pengling
Weaknesses
- Less effective solo
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Twisty Bridges to learn Completionist-specific mechanics
- Focus on base building — it's this build's primary system
- Prioritize Spy Pengling as your first major upgrade
- See our full Completionist build guide for the optimal gear progression
Lore Hunter
Focus on finding every PDA log, alien artifact, and story fragment. Below Zero's dual storyline (Robin/Al-An) has dozens of voice logs and data entries scattered across the world. Lore Hunters prioritize story locations over resource gathering.
| Attribute | Detail |
|---|---|
| Tier | A |
| Playstyle | Follow both the Robin investigation and Al-An body-building questlines, visiting every marked and unmarked location for story fragments. |
| Best Equipment | Scanner |
| Stat Priority | Story location knowledge, alien facility access, audio log collection |
| Core Gear | Scanner, Seatruck (for mobility), PDA log tracking |
| Key Mechanic | creature scanning |
Strengths
- Highest skill ceiling with unique mechanics
- Follow both the Robin investigation and Al-An body-building questlines, visiting every marked and unmarked location for story fragments.
- Pairs well with Scanner
Weaknesses
- Steep learning curve, punishing mistakes
- Requires deep game knowledge to use effectively
Recommended Progression
- Start in Twisty Bridges to learn Lore Hunter-specific mechanics
- Focus on creature scanning — it's this build's primary system
- Prioritize Scanner as your first major upgrade
- See our full Lore Hunter build guide for the optimal gear progression
Which Build Should You Pick?
For Beginners
Base Builder 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
Deep Explorer is the top pick once you understand the game's mechanics. Pair it with Survival Knife for the strongest overall setup.
For a Challenge
Lore Hunter 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
Completionist shines in cooperative content with utility and team support capabilities.
More Subnautica: Below Zero Guides
- Subnautica: Below Zero Subnautica: Below Zero Overview
- Subnautica: Below Zero Best Builds
- Subnautica: Below Zero Tier List
- Subnautica: Below Zero Walkthrough
- Subnautica: Below Zero Beginner's Guide
- Subnautica: Below Zero Tips & Tricks
- Subnautica: Below Zero Weapons Guide
- Subnautica: Below Zero Combat Guide
- Subnautica: Below Zero Boss Guide
- Subnautica: Below Zero Maps & Locations
- Subnautica: Below Zero Crafting Guide
Similar Games
If you enjoy Subnautica: Below Zero, 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
