Islands & Points of Interest: Survivors, Rigs, Squid, Aliens
Updated 2026-09-02 · Roblox 100 Days At Sea
Every island in 100 Days at Sea has at least one chest, but only the points of interest (POIs) give pearls, weapons and +1 day multiplier bonuses. Three of the six survivors spawn per game; finish the task on their island, then press them. The survivor behind the dynamite is Deck Chief Dan: carry the three dynamites to the unstable mine walls, let each one blow, then press him. If you cannot rescue a survivor, the task is unfinished (locked cage, unpressed button) or you hit the rare bug where a survivor island spawns inside another island. The "island with a church" and the "blue bowl island" are not documented on the wiki yet.
All points of interest
| POI | How it appears | Task | Main reward |
|---|---|---|---|
| Fisherman's Island | Always, 50 m from base | Kill 2 Buku warriors, press him | Fishing rod, dinghy, fish trades |
| Radio Towers (3) | Always, usually visible from base | Press the transponder | Pins an oil rig |
| Oil Rigs (3) | Pinned by transponders | Clear rivals, open purple chest | Container structure, +1 multiplier |
| Survivor Islands (3 of 6) | Always, near / mid / far | Island task, press survivor | +1 multiplier each, base helper |
| Pirate Islands (3) + Stronghold | Always | Kill 3 / 6 / 9 ghost pirates, free the keys | Ghost cutlass, galleon bell, 5 pearls, +1 multiplier |
| Squid Islands | Always, 500-1000 m out | Collect gold tablets, place on main island | Squid Laser, 10 pearls, +1 multiplier, corrupt shard |
| Alien Islands (4) | Alien transponder after a repelled raid | Puzzle | Food processor, alien armour, UFO, ray gun |
| Treasure Islands (6) | Treasure bottle | Short task, purple chest | Riptide, auto-turret, ghost sack, pizza oven, cannon, grenades |
| Fire biome | One biome per map | 3 golem corpses into the volcano | Fire staff |
| Ice biome | One biome per map | 20 penguins to the penguin mother | Ice staff, 5 pearls, +1 multiplier |
| Ghost Galleon | Galleon bell, 10 glue | Pirates, crate puzzle, Greenbeard | Boomstick, multiplier added to day count |
| Cargo Ship | After about 5 days | Explosive, crewmen, 4 batteries | Revolver, corrupt shard, corrupt portal |
Discovering every island (any player going on or near it) gives a separate +1 day multiplier; the small squid islands do not count.
How to rescue each survivor
One spawns close, one mid-range, one far; distance does not change difficulty. The radio structure (4 metal, 4 wood) pins the closest un-rescued survivor. A rescued survivor teleports to base, runs machines, loads the crafting table, fuels the bonfire and gives +1 day multiplier. Survivors cannot be killed.
| Survivor | Where they are | How to free them |
|---|---|---|
| Captain Stephen | Top of a cliff (harpoon up) | Drag or sack the items barricading his shelter (easiest, no weapons needed) |
| Doctor Madeline | Cage guarded by 3 Boku Pokus | Take the key from the small purple-and-gold chest, drag it to the cage |
| Professor Erik | Cage on a ghost pirate island | Defeat 8 ghost pirates that spawn one after another (bring a gun) |
| Test Subject Terrance | Tube on a small rocky island | Press all three red buttons around the island |
| Deck Chief Dan | Inside a mine | Bring 3 dynamites to the unstable walls; each explodes when close |
| Ms. Felix | Cage above magma | Turn the 3 white conducts with the red handles so water reaches the magma |
Survivor hanging in a cage: Madeline needs the key, Erik needs all 8 pirates dead, Felix needs the water flowing. The cage opens by itself once the task is done.
Third survivor bugged? The wiki records one case of a survivor island spawning partly inside another (Madeline's inside the stronghold), leaving her unreachable. Whether it is fixed is not documented yet.
Radio towers and oil rigs
Three radio tower islands sit within sight of base, each with five rival survivors (3 melee, 2 ranged) and a transponder you can press without fighting. The first transponder pressed pins the small rig, the second the big, the third the huge, whichever tower you use.
| Rig | Rivals | Doubloon chests | Purple chest unlock |
|---|---|---|---|
| Small | 4 (3 melee, 1 ranged) | 2 | Container Shelter |
| Big | 8 (6 melee, 2 ranged) | 6 | Makeshift Building |
| Huge | 15 (10 melee, 5 ranged) | 7 | Outpost |
Each rig's container item raises the day multiplier once placed and can be crafted afterwards by anyone who discovered it; duplicates do not stack. Place containers on a wooden floor on the Fisherman's Island so special nights do not destroy them.
Pirate islands and the stronghold
Three pirate islands (a crane, a rusty fort, a ring of columns) each hold a key freed by killing every ghost pirate: 3 on the closest, 6 on the second, 9 on the third. The Pirate Stronghold opens once all three keys are freed: about 20 ghost pirates (more with more players) and a mini-boss. Clearing it gives +1 day multiplier, 5 pearls, a corrupt shard, the ghost cutlass (one of the strongest melee weapons) and the galleon bell.
The Fisherman's Island
Always about 50 m in front of base. Kill the two Buku warriors and press the fisherman: every player gets a fishing rod, and the hut chest always gives a dinghy (see boats). He then trades fish for items in a fixed order, from a crab trap for a fish filet up to a swordfish spear for a swordfish steak.
Squid islands
Small islands 500-1000 m from base summon the Ancient Squid boss. Each task summons a gold tablet; tablets cannot be lost.
- Main island: take the gold tablet to pin the next squid island. Pressing the wall places every tablet you hold; once all are in, the boss appears.
- Lever island: "Red is death. Blue is life." Blue gives the tablet. Red levers each spawn a ghost pirate and can be pulled forever (glue and essence farm), but blue locks them.
- Food island: a statue says "I hunger for [food]". Put that food in the golden cuve; sushi, fish and chips, fish filet and jelly are common asks.
- Material island: "that which forges steel" or "that which feeds fire". Put 5 metal or 5 wooden items in the cuve.
Kill the 8 tentacles with ranged weapons, then the Ancient Squid (2,000 base HP, eye laser about 20 damage) for 10 pearls, +1 day multiplier, a corrupt shard and the Squid Laser.
Alien islands
A repelled alien raid drops an alien transponder that summons one alien island about 3 km from base. Each of the four appears once per game.
| Island | Task | Reward |
|---|---|---|
| Glorbus | Feed the fat alien 20 of any food | Food processor (alien soup for 5 food) |
| Dynamite | Drag dynamites to the yellow circle in front of each UFO | Alien armour set, about as strong as diamond |
| UFO | Bring 5 of the 6 Alien Repair Matrix cards to the broken UFO | UFO boat (Alien Overlord class gets two) |
| Ray Gun | Rotate mirrors in 3 laser rooms so every beam hits the central room | Ray gun |
Dynamite island aliens drop essences, so some players farm there instead of blowing up the UFOs.
Treasure islands, biomes and ships
A treasure bottle unlocks one of six treasure islands; the grenades island refills you to 3 grenades forever, but the wiki rates them too weak to return for. In the fire biome, drop three magma golem corpses into the volcano and jump down (no fall damage) to fight the lava boss for the fire staff. In the ice biome, sack 20 penguins across 7 islands and bring them to the penguin mother to summon the King of the Snow; penguins do not respawn. The Ghost Galleon (galleon bell, 10 glue) ends with Greenbeard at 2,000 base HP and a boomstick, and sinks 2 min 30 s after the kill. The cargo ship arrives after about 5 days and holds the corrupt portal.