100 Days at Sea Walkthrough: Complete Day 1–100 Survival Guide, Raft Building, and Exploration Tips

Welcome to this 100 Days at Sea walkthrough, a step-by-step survival guide designed to help you progress from your first day on a small raft to the ultimate goal of surviving 100 days in the mysterious Bermuda Triangle.

Developed by Stranded Devs, 100 Days at Sea is a Roblox ocean survival adventure combining resource gathering, raft construction, island exploration, combat, and multiplayer cooperation. Players must collect materials using a harpoon, expand their floating base, prepare defenses, and survive increasingly dangerous encounters.

Whether you are playing alone or with friends, successful progression depends on balancing exploration, equipment upgrades, and raft protection.

This walkthrough divides the 100-day challenge into practical progression stages. The recommended milestones are strategic guidelines rather than confirmed in-game unlock requirements.

1. Days 1–10: Getting Started and Building Your First Raft

The opening days establish your survival foundation. Your priority should be securing essential resources and creating a raft that supports continued exploration.

Step 1: Learn Resource Gathering

Your harpoon is an important tool for collecting resources from the surrounding ocean.

Begin by identifying collectible materials and practicing how to retrieve them efficiently.

Recommended early-game actions:

1. Examine your starting raft and available equipment.
2. Use your harpoon to collect accessible floating resources.
3. Identify which materials are required for construction.
4. Prioritize materials needed for essential raft improvements.
5. Avoid unnecessary exploration until your basic setup is secure.

Beginner Tip: Collect resources consistently instead of waiting until construction becomes urgent. Maintaining a supply of materials makes later upgrades easier.

Step 2: Expand Your Raft Carefully

Your raft functions as your central survival base throughout the adventure.

Rather than expanding randomly, organize your construction around accessibility and protection.

A practical early raft layout should provide:

• Central area: Space for important equipment and player movement.
• Storage area: A designated location for resources, if storage options are available.
• Defensive perimeter: Outer sections that can be protected against hostile threats.
• Expansion space: Room for additional structures as resources become available.

Avoid creating an unnecessarily large raft before securing its essential sections.

Step 3: Prepare for Dangerous Encounters

Ocean survival becomes more difficult when enemies threaten your raft or interrupt exploration.

Before taking major risks, inspect your available weapons and defensive construction options.

Your initial objective is not to defeat every enemy immediately. Instead, focus on maintaining a safe position and preserving critical resources.

By Day 10, aim to have a stable raft, a reliable gathering routine, and enough materials for your next improvements.

2. Days 11–30: Island Exploration, Weapons, and Resource Management

Once your raft is established, begin expanding your exploration activities.

The islands scattered throughout the Bermuda Triangle create opportunities to discover resources, equipment, and dangerous encounters.

Step 1: Prepare Before Visiting Islands

Do not approach unfamiliar islands without considering the risks.

Before leaving your raft:

• Check your available weapons and equipment.
• Make sure your raft is reasonably secure.
• Bring appropriate supplies where the inventory system allows.
• Identify a clear route back to safety.
• Coordinate exploration responsibilities when playing with teammates.

Treat unfamiliar locations cautiously, especially when enemy behavior and environmental hazards are unknown.

Step 2: Explore Systematically

Instead of rushing through an island, examine accessible areas methodically.

Prioritize useful resources and potential equipment discoveries before investigating dangerous locations.

A practical exploration sequence is:

1. Identify a relatively safe landing location.
2. Observe nearby threats.
3. Gather accessible resources.
4. Investigate potential equipment locations.
5. Return to your raft before your situation becomes dangerous.

Specific island layouts, loot locations, and enemy spawns may vary with game updates and should be verified during gameplay.

Step 3: Improve Combat Readiness

As you discover weapons, evaluate their usefulness against the enemies you encounter.

Consider attack range, practical damage output, and how safely you can use each weapon.

Avoid assuming that a newly discovered weapon is automatically superior.

Combat Tip: Maintaining enough space to reposition can be more valuable than continuously attacking, particularly when fighting unfamiliar enemies.

By Day 30, your goal should be a stronger raft, improved combat readiness, and a sustainable exploration routine.

3. Days 31–70: Advanced Raft Building, Defenses, and Multiplayer Strategy

The middle portion of your journey is about turning a basic survival setup into a dependable floating base.

Your focus should shift toward protecting important structures, managing resources, and preparing for difficult encounters.

Recommended Raft Upgrade Priorities

These priorities describe recommended strategies, not verified upgrade names or mandatory construction requirements.

Strengthen Your Defensive Layout

A good defensive layout should protect important sections without making movement difficult.

Keep frequently used areas accessible and avoid placing essential equipment in exposed positions when safer alternatives exist.

If enemies can damage structures, prioritize repairing critical sections before adding decorative or unnecessary expansions.

Coordinate Multiplayer Responsibilities

100 Days at Sea supports multiplayer gameplay, allowing players to cooperate during resource collection, construction, and combat.

Teams can improve efficiency by dividing responsibilities.

For example:

• Resource gatherer: Collects materials needed for construction.
• Builder: Organizes raft expansion and structural improvements.
• Explorer: Investigates islands and identifies useful discoveries.
• Defender: Watches for enemies and supports combat encounters.

These are suggested team responsibilities, not confirmed official character classes.

Players should communicate before major exploration trips so the raft is not left unnecessarily vulnerable.

Prepare for Stronger Enemies

If you encounter powerful enemies or bosses, avoid entering combat without adequate preparation.

Observe attack behavior, identify opportunities to reposition, and prioritize survival over aggressive damage.

Specific boss names, attack patterns, and rewards require confirmation in the current game version.

4. Days 71–100: Final Survival Strategy and Walkthrough FAQ

The final stage focuses on maintaining a reliable survival routine and avoiding unnecessary losses.

Instead of taking every available risk, prioritize activities that directly support reaching Day 100.

Final Survival Checklist

Before continuing toward the final milestone, review your preparation:

1. Inspect your raft: Repair or reinforce important sections where possible.
2. Check resources: Maintain supplies for essential construction and equipment.
3. Review weapons: Use equipment suited to the threats you encounter.
4. Limit unnecessary risks: Avoid dangerous exploration without a clear objective.
5. Coordinate teammates: Assign responsibilities during difficult encounters.
6. Monitor your progress: Track the current day and adjust priorities accordingly.

Day-by-Day Progression Summary

This schedule is a suggested route through the challenge rather than a list of confirmed day-specific events.

Frequently Asked Questions

How do you survive 100 days in 100 Days at Sea?

Focus on gathering resources with your harpoon, expanding your raft, exploring islands carefully, and preparing for enemy encounters. Maintain essential supplies and protect your raft as you approach Day 100.

What should beginners build first in 100 Days at Sea?

Prioritize essential raft expansion and protection before investing heavily in additional structures. Keep important equipment accessible and reserve resources for necessary improvements.

Is 100 Days at Sea easier with friends?

Multiplayer cooperation can make resource gathering, construction, exploration, and combat more manageable. Assigning responsibilities and communicating during dangerous encounters can improve team efficiency.

Final Tip: The key to completing this 100 Days at Sea walkthrough is consistent preparation. Build a dependable raft, gather resources regularly, explore with purpose, and avoid unnecessary risks. A balanced survival strategy gives you the strongest foundation for reaching Day 100 in the Bermuda Triangle.