Surviving the ocean in 100 Days at Sea isn’t just about gathering resources and expanding your raft. Once the sun goes down, you may have to defend your base against powerful enemy raids that become increasingly dangerous as the game progresses.
Some raids introduce unique enemies with special rewards, while others can destroy your defenses if you’re caught unprepared. Knowing what each raid does—and how to deal with it—is essential if you want to survive all 100 days. This guide explains every special night raid currently available in 100 Days at Sea, including the enemies you’ll face, their rewards, and the best strategies for surviving them.
How Night Raids Work
Special raids don’t happen without warning. When a raid is scheduled, you’ll receive a notification near the top of the screen below the day counter during the previous day. Once night falls, another alert appears to confirm the raid has begun. A few important rules to remember include:
- Only one special raid can occur during a single night.
- Most raid types are selected randomly.
- The very first night always features a Ghost Pirate Raid.
Because you’ll receive advance notice for most encounters, use the daytime to repair your raft, refill ammunition, and prepare your defenses.
Ghost Pirate Raid
The Ghost Pirate Raid is the first special encounter every player experiences. Ghostly ships emerge from the sea before unloading spectral pirates onto your raft. These enemies immediately begin attacking anything nearby, including:
- Your character
- Walls
- Turrets
- Storage boxes
Every defeated Ghost Pirate rewards you with:
- 1 Glue
Glue is an important crafting material used to create equipment and additional raft structures at the Crafting Table.
How Ghost Pirate Raids Become Harder
As your survival run continues, Ghost Pirate Raids become significantly more dangerous. Later in the game, small ghost ships are replaced by massive ghost galleons capable of bombarding your raft with cannon fire while continuously deploying stronger enemies. Because of their ranged attacks, firearms are generally the safest way to eliminate Ghost Pirates before they overwhelm your defenses.
Best Strategy
- Keep your distance whenever possible.
- Prioritize enemies attacking storage or turrets.
- Use guns instead of melee weapons.
- Collect Glue after the battle to upgrade your equipment.
Buku Raid
Buku Raids are among the least threatening encounters in the game. Unlike most raids, Buku enemies don’t always announce their arrival. They can appear unexpectedly, even during daylight hours, and immediately attack anyone nearby. Fortunately, these enemies have relatively low health and deal minimal damage. The greatest danger comes when your character is standing idle without defensive structures protecting the raft.
Buku Raid Rewards
Defeating a Boku Boku enemy has a chance to reward you with a quality sword, making these encounters worthwhile despite their low difficulty.
Best Strategy
- Eliminate Buku enemies as soon as they appear.
- Stay active instead of leaving your character AFK.
- Use melee weapons to conserve ammunition.
Kraken Raid
The Kraken Raid is one of the toughest defensive battles you’ll encounter. Instead of attacking with humanoid enemies, enormous tentacles rise from the water around your raft and begin smashing nearby structures. Each tentacle has approximately:
- 500 HP
Combined, the entire Kraken has roughly:
- 3,000 HP
Because multiple tentacles can attack simultaneously, the raid quickly becomes overwhelming if you spread your attacks too thin.
Kraken Raid Rewards
Destroying each tentacle rewards you with:
- Jar of Glue (+3 Glue)
This makes Kraken encounters one of the best sources of crafting materials in the game.
Best Strategy
- Focus on one tentacle at a time.
- Avoid fighting multiple tentacles simultaneously.
- Use melee weapons whenever it’s safe.
- Weapons with limited ammunition, such as the Ray Gun, also perform well.
Keeping the number of active tentacles low greatly reduces incoming damage to your raft.
Alien Raid
Alien Raids introduce an entirely different type of enemy. A large UFO hovers above your raft before teleporting groups of small green aliens directly onto your base. Early in the game, these aliens are the weakest enemies you’ll face and can usually be defeated without much difficulty. However, later survival days introduce stronger alien warriors that are capable of dealing damage comparable to Ghost Pirates.
Alien Raid Rewards
After defeating every alien, there’s a chance to receive an:
- Alien Transponder
This special item can be used to summon one of four different alien islands located roughly 3 kilometers away. These islands provide additional exploration opportunities and valuable rewards beyond the standard survival gameplay.
Best Strategy
- Eliminate weaker aliens quickly before stronger reinforcements arrive.
- Stay mobile to avoid becoming surrounded.
- Prepare for increased difficulty during later days.
Which Night Raid Is the Hardest?
While every raid presents unique challenges, their overall difficulty varies depending on your progression. Generally, players can expect the following difficulty order:
- Buku Raid (Easiest)
- Alien Raid (Early Game)
- Ghost Pirate Raid
- Kraken Raid
- Ghost Pirate Raid with Ghost Galleons (Late Game)
Late-game Ghost Pirate Raids become especially dangerous because they combine powerful enemies with continuous cannon fire from enemy ships.
Night raids are one of the biggest survival challenges in 100 Days at Sea, forcing players to defend their raft against increasingly dangerous enemies as the days progress. Whether you’re battling Ghost Pirates, fending off Kraken tentacles, defeating unexpected Buku attackers, or repelling an alien invasion, each raid requires a different strategy to survive efficiently. Learning how every encounter works, preparing your defenses in advance, and making the most of the rewards they drop will greatly improve your chances of reaching the end of your 100-day journey.