Alien Invasion Event Guide — 100 Days At Sea

What Is the Alien Invasion Event?

Alien Invasion is a July 2026 content event that adds event-exclusive alien enemies during Nights 6–7 of your run. They are small mobs — a few melee hits each — but they stack on top of standard night raids and Angler Fish rules.

Clearing the invasion wave grants a Transponder in your inventory. Activate it to mark alien island on the map for high-tier chest loot.

The event runs alongside Ice Region content — you can still sail to ice island during July 2026. No separate download required.

Night 6–7 Invasion Timeline

Night 6–7: Alien mobs spawn on and around your raft (Pro Game Guides, AllThingsHow, July 2026).

Before Night 6: complete early build order — Bonfire Level 3, Sawmill, Crab Trap, Map Radar minimum.

Visit fisherman island early for Dinghy speed and Fisherman trades before invasion nights.

After clear: use Transponder → sail Alien Island → resume main eight-island route on islands.

Full changelog on game updates.

Code Alerts (July 6, 2026)

GamesRadar (July 3): no official active codes — only 20PEARLS, expired after ~13 hours. Archived on expired.

Community-reported strings that may still work: SEAADVENTURE (50 Coins), STRANDEDDEVS (Companion Chest), 100DAYS (25 Pearls) — test on codes.

Unverified event strings like ALIENS on unverified. Redeem official Discord codes within minutes of announcement.

Pre-Event Survival Checklist

Map Radar + Dinghy from Fisherman Island — fisherman island.

Crab Trap or cooked food stock — starvation during invasion nights is fatal.

Bonfire always lit — Angler Fish still spawns if fire goes out.

Auto Turret (150 Doubloons, Travelling Merchant) for solo players per Pro Game Guides.

10+ Medkits from crafting; co-op roles on co op strategy.

Fighting Aliens During Invasion Nights

Any basic melee weapon clears aliens quickly. Ranged helps when spawns spread across raft edges.

Sharpshooter, Pirate, and Cowboy outperform pure melee if aliens spawn at distance.

Soldier tanks burst damage; Medic sustains through stacked night damage.

Night class (+20% night vision) and Lantern improve visibility — see night survival.

Container Shelter reduces exposure during docked fights — raft building.

After Alien Island — Resume Progression

Alien Island loot is optional — do not skip Shipwreck Iron or Volcano fire prep.

Standard route: Jungle → Desert (Sand Worm) → Shipwreck → Volcano → Ice → Kraken → Bermuda per survive day 100.

Archive expired 20PEARLS on expired as template for future flash codes.