Alien Island in 100 Days At Sea

How to Unlock Alien Island

Step 1: Reach Night 6–7 in your current run. The Alien Invasion event spawns small alien enemies on and around your raft during these nights (Pro Game Guides, July 2026).

Step 2: Repel the invasion with melee or ranged weapons — aliens fall in a few hits from any basic weapon. Stock Medkits from crafting and keep Bonfire lit to avoid Angler Fish while fighting.

Step 3: After clearing the wave, open your inventory and activate the Transponder item. The Transponder marks Alien Island on your map — no blind sailing required if you already built Map Radar per early build order.

Step 4: Sail to Alien Island, loot chests, then resume standard island progression toward Volcano, Ice, and Bermuda per survive day 100.

Alien Invasion Night Mechanics (Nights 6–7)

Aliens are event-exclusive mobs — smaller than Ghost Pirates, faster to kill, but they arrive during the same night window as standard raft raids. Treat Nights 6–7 as a gear check before sailing to harder biomes.

Container Shelter from raft building reduces exposure during docked fights. Auto Turret (Travelling Merchant, 150 Doubloons) handles stray spawns if you are solo — see early build order.

Night class (+20% night vision) and Lantern improve target acquisition when multiple aliens approach from raft edges.

Full event context, code alerts, and co-op role splits on alien invasion event.

Loot and Why Alien Island Matters

Alien Island holds high-tier loot — chest rolls above early Fisherman Island or Mini Island pickups. Exact drop tables shift with Stranded Devs patches; community reports emphasize weapons, building materials, and Pearl-adjacent currency boosts.

Visit after Fisherman Island Dinghy pickup (usually in one of two Fisherman chests) to shorten travel time across the map.

Treasure Hunter (+25% chest loot) and Raider (+20% damage + raid loot) accelerate Alien Island farming if you plan multiple event runs during July 2026.

Compare chest color tiers on chest tiers and spend Pearls wisely on tier list before assuming Alien loot replaces Volcano or Ice gear gates.

Recommended Prep Checklist

Bonfire Level 3+ with Sawmill for infinite Wood — early build order.

Crab Trap or cooked food stock so invasion nights do not overlap with starvation.

Map Radar unlocked — marks islands without wasting days sailing blind.

Basic melee weapon or Flintlock Pistol before Night 6 — Desert Island not required for alien kills, but undergeared groups still wipe to Angler Fish if Bonfire goes out.

Redeem any working codes on codes before spending Pearls on class rerolls — official codes expire fast per GamesRadar (20PEARLS lasted ~13 hours).

Alien Island vs Main Eight Islands

The eight-biome spine remains: Starter → Jungle → Desert → Shipwreck → Volcano → Ice → Kraken → Bermuda on islands. Alien Island is optional side content during the July 2026 event window.

Do not skip Shipwreck Iron or Volcano fire prep because Alien Island dropped a strong weapon — Lava Guardian and Frost Giant still gate mid-game progression.

Fisherman Island (nearest early stop, two chests, Fisherman NPC food trades) and Mini Islands (one–two chests, zero risk) complement Alien Island in the first ten days — see fisherman island.