Islands are the main places you leave the raft for in 100 Days At Sea. Some stops are single named landfalls, others are whole types of island or full regions with several pins inside them. Use visit timing, threats, and loot or NPC value to decide what is worth a detour and what can wait until you are geared.
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Visit priority
Early & low risk
Start here before long sails. Fisherman Island is the usual first landfall; Mini Islands are a type of small stop you skim for chests while traveling. Map Radar makes later exploration less random.
Fisherman Island
Best first island stop. Secure the early chests and Dinghy when they appear, then use food trades with the Fisherman to upgrade loadout before longer sails.
- when to visit
- Early
- kind
- Named island
- threats
- Usually light compared with later key islands; still watch water predators while approaching.
- loot / NPC
- Often two chests (one commonly holds a Dinghy). Fisherman NPC trades food for higher-tier gear and buildings.
- linked boss
- -
- how to find
- Nearest useful landfall after spawn for most runs. Build Map Radar soon so later islands are easier to mark.
Mini Islands
A type of small island, not a single unique pin. Scoop chests and loose loot whenever you pass one; they are easy filler value between bigger objectives.
- when to visit
- Early
- kind
- Island type
- threats
- Low combat pressure; main risk is over-sailing without a return plan.
- loot / NPC
- One or two chests plus loose ground loot on many of these small stops.
- linked boss
- -
- how to find
- Scattered around the open sea. Check them while traveling between larger targets once Map Radar is up.
| Name | Description | when to visit | kind | threats | loot / NPC | linked boss | how to find |
|---|---|---|---|---|---|---|---|
| Fisherman Island | Best first island stop. Secure the early chests and Dinghy when they appear, then use food trades with the Fisherman to upgrade loadout before longer sails. | Early | Named island | Usually light compared with later key islands; still watch water predators while approaching. | Often two chests (one commonly holds a Dinghy). Fisherman NPC trades food for higher-tier gear and buildings. | - | Nearest useful landfall after spawn for most runs. Build Map Radar soon so later islands are easier to mark. |
| Mini Islands | A type of small island, not a single unique pin. Scoop chests and loose loot whenever you pass one; they are easy filler value between bigger objectives. | Early | Island type | Low combat pressure; main risk is over-sailing without a return plan. | One or two chests plus loose ground loot on many of these small stops. | - | Scattered around the open sea. Check them while traveling between larger targets once Map Radar is up. |
Visit priority
Combat & rescue
Mid-run islands built around fights and helpers. Survivor Islands are a type you clear for people, not one fixed pin. Alien Island waits until after the early invasion and the Transponder path.
Survivor Islands
An island type focused on rescue combat, not one fixed island name. Clear Ghost Pirate defenses, free survivors, and treat these as mid-run power spikes rather than day-one stops.
- when to visit
- Mid
- kind
- Island type
- threats
- Ghost Pirate waves (melee and gunner) before you can free anyone. Undergeared visits often fail.
- loot / NPC
- Rescued survivors act like long-term helpers for the run after you clear the fight.
- linked boss
- -
- how to find
- Radio building marks survivor locations on the map. Prepare weapons and healing before committing.
Alien Island
Mid-run destination after the alien invasion window. Once you have the Transponder path, treat it as a high-value loot island rather than a blind early sail.
- when to visit
- Mid
- kind
- Named island
- threats
- Alien invasion pressure around nights 6–7 before the island becomes a clean loot target.
- loot / NPC
- High-tier loot after the invasion is handled. Transponder item is used to pin the island location.
- linked boss
- -
- how to find
- Survive or repel the early alien invasion event, then use the Transponder to locate Alien Island.
| Name | Description | when to visit | kind | threats | loot / NPC | linked boss | how to find |
|---|---|---|---|---|---|---|---|
| Survivor Islands | An island type focused on rescue combat, not one fixed island name. Clear Ghost Pirate defenses, free survivors, and treat these as mid-run power spikes rather than day-one stops. | Mid | Island type | Ghost Pirate waves (melee and gunner) before you can free anyone. Undergeared visits often fail. | Rescued survivors act like long-term helpers for the run after you clear the fight. | - | Radio building marks survivor locations on the map. Prepare weapons and healing before committing. |
| Alien Island | Mid-run destination after the alien invasion window. Once you have the Transponder path, treat it as a high-value loot island rather than a blind early sail. | Mid | Named island | Alien invasion pressure around nights 6–7 before the island becomes a clean loot target. | High-tier loot after the invasion is handled. Transponder item is used to pin the island location. | - | Survive or repel the early alien invasion event, then use the Transponder to locate Alien Island. |
Visit priority
Hard key islands
Late, heavily guarded key targets. Solo players should delay Tower Island and Fortress islands until weapons, healing, and a real retreat plan exist.
Tower Island
Late hard island tied to keys and elite guards. Save it for co-op or well-geared solo runs; it is not an early exploration target.
- when to visit
- Late
- kind
- Named island
- threats
- Heavy guards. Solo early attempts are a common wipe.
- loot / NPC
- Key-related progression and strong guarded rewards once you can clear the defenders.
- linked boss
- -
- how to find
- Identify the tower landmark once Map Radar coverage is solid. Delay until weapons and defenses are ready.
Fortress islands
A type of heavily guarded key island, not a single map pin. Treat fortress stops as late or co-op content after you have real weapons and a retreat plan.
- when to visit
- Late
- kind
- Island type
- threats
- Dense enemy defense similar to Tower Island. Underprepared solo crews usually die.
- loot / NPC
- Key islands with high-tier guarded loot after the clear.
- linked boss
- -
- how to find
- Marked as key fortresses on exploration routes. Group them with Tower Island in late-run planning.
| Name | Description | when to visit | kind | threats | loot / NPC | linked boss | how to find |
|---|---|---|---|---|---|---|---|
| Tower Island | Late hard island tied to keys and elite guards. Save it for co-op or well-geared solo runs; it is not an early exploration target. | Late | Named island | Heavy guards. Solo early attempts are a common wipe. | Key-related progression and strong guarded rewards once you can clear the defenders. | - | Identify the tower landmark once Map Radar coverage is solid. Delay until weapons and defenses are ready. |
| Fortress islands | A type of heavily guarded key island, not a single map pin. Treat fortress stops as late or co-op content after you have real weapons and a retreat plan. | Late | Island type | Dense enemy defense similar to Tower Island. Underprepared solo crews usually die. | Key islands with high-tier guarded loot after the clear. | - | Marked as key fortresses on exploration routes. Group them with Tower Island in late-run planning. |
Visit priority
Special regions
Region cards cover multiple sub-islands. Ice Biome proper names are not fully documented publicly, so one Ice Region card and one Volcano Region card stand in for the whole chain.
Ice Region
One region card for the whole Ice Biome, which spans multiple ice islands without publicly stable unique names. Focus on penguin rescues and the Ice Biome boss rather than inventing sub-island labels.
- when to visit
- Mid–late
- kind
- Region
- threats
- Cold-region enemies across multiple ice islands, plus the Ice Biome boss path (community videos often call the boss Yeti).
- loot / NPC
- Penguin rescues for Arctic Rescue progress, Ice Mage unlock path after the region objectives, and other cold-region rewards.
- linked boss
- Yeti / King Of The Snow
- how to find
- Sail into the ice biome once the raft is stable. Map Radar and mid-run gear matter more than day-one scouting.
Volcano Region
Single region card for the volcano chain. Prep weapons and healing, clear Fire Golems, open the volcano, then face Lord of Lava without treating this as an early loot island.
- when to visit
- Mid–late
- kind
- Region
- threats
- Fire Golems and high combat pressure on the volcano route before the boss fight.
- loot / NPC
- Magma-route rewards after clearing the chain (community leads include Magma Chest and Magma Staff; verify in-run).
- linked boss
- Lord of Lava
- how to find
- Locate the volcano area mid-run with Map Radar and combat prep. Common route: defeat three Fire Golems, throw their bodies into the volcano, then fight below.
| Name | Description | when to visit | kind | threats | loot / NPC | linked boss | how to find |
|---|---|---|---|---|---|---|---|
| Ice Region | One region card for the whole Ice Biome, which spans multiple ice islands without publicly stable unique names. Focus on penguin rescues and the Ice Biome boss rather than inventing sub-island labels. | Mid–late | Region | Cold-region enemies across multiple ice islands, plus the Ice Biome boss path (community videos often call the boss Yeti). | Penguin rescues for Arctic Rescue progress, Ice Mage unlock path after the region objectives, and other cold-region rewards. | Yeti / King Of The Snow | Sail into the ice biome once the raft is stable. Map Radar and mid-run gear matter more than day-one scouting. |
| Volcano Region | Single region card for the volcano chain. Prep weapons and healing, clear Fire Golems, open the volcano, then face Lord of Lava without treating this as an early loot island. | Mid–late | Region | Fire Golems and high combat pressure on the volcano route before the boss fight. | Magma-route rewards after clearing the chain (community leads include Magma Chest and Magma Staff; verify in-run). | Lord of Lava | Locate the volcano area mid-run with Map Radar and combat prep. Common route: defeat three Fire Golems, throw their bodies into the volcano, then fight below. |
Visit priority
Structures & objectives
Session and key objectives more than casual loot stops. Rival Rigs are a set of three (badge-backed). Towers feed that route; Strongholds and Ghost Galleon are high combat structure or ship goals.
Rival Rigs
One card for the full set of three Rival Rigs, not three invent-named platforms. Clear all three in a single session for the badge objective and treat them as mid-to-late combat POIs.
- when to visit
- Mid–late
- kind
- Structure set
- threats
- Defended rival platforms. Size and pressure scale across the three rigs in a session.
- loot / NPC
- Combat loot and structure rewards from clearing each rig. Session badge goal for defeating all three.
- linked boss
- -
- how to find
- Use Radio Towers and map markers to track the three rival rigs in one run. Badge wording confirms exactly three.
Radio Towers
Support structures for the Rival Rigs objective chain. Visit towers as you hunt the three rigs rather than treating them as a separate endgame region.
- when to visit
- Mid
- kind
- Structure set
- threats
- Usually lighter than full rig assaults, but still treat travel and night pressure seriously.
- loot / NPC
- Progresses the Rival Rigs route by helping you locate or unlock the next rig targets.
- linked boss
- -
- how to find
- Sail to tower landmarks tied to the Rival Rigs chain. Multiple towers appear across a full clear.
Ghost Galleon
Repeatable ghost-ship dungeon objective rather than a starter land island. Soft-links to the bosses collection for fight detail; this card only flags why and when to sail to it.
- when to visit
- Mid–late
- kind
- Ship dungeon
- threats
- Ship-board combat and dungeon pressure. Repeatable enough that multi-clear badges exist.
- loot / NPC
- Combat rewards from clearing the galleon. Strongholds videos show it as part of the key/structure loop.
- linked boss
- Ghost Galleon
- how to find
- Appears as a major combat ship objective. Bring a full weapon and healing plan before boarding.
Strongholds
Late structure chain for keys and heavy ghost-pirate combat. Plan it after early islands and basic gear; leave deep fight steps to the bosses or combat pages.
- when to visit
- Late
- kind
- Structure set
- threats
- Ghost Pirate stronghold defenses and multi-key progression pressure.
- loot / NPC
- Key progression (multiple stronghold keys) and high-end structure loot after the clear.
- linked boss
- -
- how to find
- Track key drops and stronghold landmarks once mid-run combat is stable. Often grouped with Ghost Galleon in showcases.
| Name | Description | when to visit | kind | threats | loot / NPC | linked boss | how to find |
|---|---|---|---|---|---|---|---|
| Rival Rigs | One card for the full set of three Rival Rigs, not three invent-named platforms. Clear all three in a single session for the badge objective and treat them as mid-to-late combat POIs. | Mid–late | Structure set | Defended rival platforms. Size and pressure scale across the three rigs in a session. | Combat loot and structure rewards from clearing each rig. Session badge goal for defeating all three. | - | Use Radio Towers and map markers to track the three rival rigs in one run. Badge wording confirms exactly three. |
| Radio Towers | Support structures for the Rival Rigs objective chain. Visit towers as you hunt the three rigs rather than treating them as a separate endgame region. | Mid | Structure set | Usually lighter than full rig assaults, but still treat travel and night pressure seriously. | Progresses the Rival Rigs route by helping you locate or unlock the next rig targets. | - | Sail to tower landmarks tied to the Rival Rigs chain. Multiple towers appear across a full clear. |
| Ghost Galleon | Repeatable ghost-ship dungeon objective rather than a starter land island. Soft-links to the bosses collection for fight detail; this card only flags why and when to sail to it. | Mid–late | Ship dungeon | Ship-board combat and dungeon pressure. Repeatable enough that multi-clear badges exist. | Combat rewards from clearing the galleon. Strongholds videos show it as part of the key/structure loop. | Ghost Galleon | Appears as a major combat ship objective. Bring a full weapon and healing plan before boarding. |
| Strongholds | Late structure chain for keys and heavy ghost-pirate combat. Plan it after early islands and basic gear; leave deep fight steps to the bosses or combat pages. | Late | Structure set | Ghost Pirate stronghold defenses and multi-key progression pressure. | Key progression (multiple stronghold keys) and high-end structure loot after the clear. | - | Track key drops and stronghold landmarks once mid-run combat is stable. Often grouped with Ghost Galleon in showcases. |
Build Map Radar early so later landfalls are easier to mark. Your first useful sail is almost always Fisherman Island: grab the early chests (a Dinghy often shows up), trade food with the Fisherman, then hop Mini Islands for small chest runs while you head to bigger goals.
Mid run is when combat islands earn their keep. Survivor Islands are a type, not one fixed pin: clear Ghost Pirate waves, free the people, and use the Radio building so the map shows where the next rescue sits. Alien Island opens after the invasion window around nights 6 to 7; use the Transponder once you have it instead of sailing blind.
Hard key islands punish early heroics. Tower Island and Fortress islands sit in the late tier for a reason: dense guards and key progression, better as co-op or after real weapons and a retreat plan. Solo undergeared runs wipe more often than they loot.
Ice Region and Volcano Region are hubs, not single named dots. Ice spans several ice islands without stable public proper names; focus on penguin rescues and the Ice Biome boss path (community videos often call the boss Yeti, and the badge frames it as King Of The Snow). Volcano follows a short chain: three Fire Golems, bodies into the volcano, then Lord of Lava. Bring healing and do not treat either region like a day-one loot island.
Structures finish the mid-to-late loop. Radio Towers help you track Rival Rigs; clear all three rigs in one session for the badge goal. Strongholds push key progression with heavy Ghost Pirate defense. Ghost Galleon is a repeatable ship dungeon, not a starter land stop: sail there for the fight objective, then use the bosses page if you want full fight steps.
Common sail mistakes
- Hitting Tower or Fortress before weapons and healing catch up.
- Skipping Fisherman and Mini stops, then starving for early gear and a small boat.
- Treating Ice or Volcano like one small chest island instead of a multi-stop region.
- Chasing map rumors with fake coordinates; radar, Radio, Transponder, and towers beat guesswork.
- Boarding Ghost Galleon or a full stronghold with no retreat plan.
Quick visit order
- Early: Fisherman Island, then Mini Islands while you travel.
- Mid: Survivor Islands via Radio, Alien Island after the invasion and Transponder.
- Mid to late: Ice Region, Volcano Region, Radio Towers into all three Rival Rigs.
- Late: Tower Island, Fortress islands, Strongholds, Ghost Galleon when you can board safely.
FAQ
Which island should I sail to first in 100 Days At Sea?
Fisherman Island is the best first stop for most runs. Grab the early chests (a Dinghy often appears), trade food with the Fisherman for better gear and buildings, then skim Mini Islands for small loot while you travel.
Are Mini Islands and Survivor Islands single places on the map?
No. They are island types, not one unique pin each. Mini Islands are small low-risk stops with a chest or two. Survivor Islands are combat rescue landfalls: clear Ghost Pirates, free survivors, and use the Radio building to mark the next ones.
When should I try Tower Island or Fortress islands?
Treat them as late or co-op content. Both are heavily guarded key islands. Undergeared solo visits are a common wipe, so wait until weapons, healing, and Map Radar coverage are solid.
What is the Ice Region in 100 Days At Sea?
Ice Region (also called the Ice Biome) is a multi-island cold zone, not a single named pin. Focus on penguin rescues for Arctic Rescue progress and the Ice Biome boss path for King Of The Snow. Unique names for every ice sub-island are not fully settled in public info, so treat Ice as one region goal.
How do I start the Volcano Region boss chain?
Prep mid-to-late gear first. The common route is defeat three Fire Golems, throw their bodies into the volcano, then fight Lord of Lava. Full boss tactics belong on the bosses page; this is only the location chain.
How many Rival Rigs are there?
Exactly three in a session. Use Radio Towers and map markers to track them, then clear all three in one run for the related badge goal.
Is Ghost Galleon an island?
It plays as a ship dungeon objective, not a starter land island. Sail there mid-to-late with weapons and healing ready. It is repeatable enough that multi-clear badges exist; soft-link to the bosses page for fight detail.
Is every island a unique named pin?
No. Some stops have fixed names, while others are island types, whole regions, or structure sets. Magellan still asks you to visit all islands in a session, but the open sea can grow with updates, so plan by visit priority and gear, not by memorizing a closed name list.
